diff --git a/src/components/dms/ActionsWrapper.tsx b/src/components/dms/ActionsWrapper.tsx
index 89c4a06520..366b117976 100644
--- a/src/components/dms/ActionsWrapper.tsx
+++ b/src/components/dms/ActionsWrapper.tsx
@@ -1,5 +1,5 @@
 import {View} from 'react-native'
-import {type ChatBskyConvoDefs} from '@atproto/api'
+import {type ChatBskyConvoDefs, type ModerationOpts} from '@atproto/api'
 import {useLingui} from '@lingui/react/macro'
 
 import {atoms as a} from '#/alf'
@@ -10,18 +10,23 @@ export function ActionsWrapper({
   message,
   isFromSelf,
   senderProfile,
+  moderationOpts,
   children,
 }: {
   message: ChatBskyConvoDefs.MessageView
   hasReactions?: boolean
   isFromSelf: boolean
   senderProfile?: bsky.profile.AnyProfileView
+  moderationOpts: ModerationOpts | undefined
   children: React.ReactNode
 }) {
   const {t: l} = useLingui()
 
   return (
-    <MessageContextMenu message={message} senderProfile={senderProfile}>
+    <MessageContextMenu
+      message={message}
+      senderProfile={senderProfile}
+      moderationOpts={moderationOpts}>
       {trigger =>
         // will always be true, since this file is platform split
         trigger.IS_NATIVE && (
diff --git a/src/components/dms/ActionsWrapper.web.tsx b/src/components/dms/ActionsWrapper.web.tsx
index 0d3df37637..b89712bd1f 100644
--- a/src/components/dms/ActionsWrapper.web.tsx
+++ b/src/components/dms/ActionsWrapper.web.tsx
@@ -1,8 +1,9 @@
 import {useCallback, useRef, useState} from 'react'
 import {Pressable, View} from 'react-native'
-import {type ChatBskyConvoDefs} from '@atproto/api'
+import {type ChatBskyConvoDefs, type ModerationOpts} from '@atproto/api'
 import {useLingui} from '@lingui/react/macro'
 
+import {useMaybeProfileShadow} from '#/state/cache/profile-shadow'
 import {useConvoActive} from '#/state/messages/convo'
 import {useSession} from '#/state/session'
 import {atoms as a, useTheme} from '#/alf'
@@ -12,19 +13,21 @@ import {EmojiSmile_Stroke2_Corner0_Rounded as EmojiSmileIcon} from '#/components
 import * as Toast from '#/components/Toast'
 import type * as bsky from '#/types/bsky'
 import {EmojiReactionPicker} from './EmojiReactionPicker'
-import {hasReachedReactionLimit} from './util'
+import {canReact, hasReachedReactionLimit} from './util'
 
 export function ActionsWrapper({
   message,
   hasReactions,
   isFromSelf,
   senderProfile,
+  moderationOpts,
   children,
 }: {
   message: ChatBskyConvoDefs.MessageView
   hasReactions?: boolean
   isFromSelf: boolean
   senderProfile?: bsky.profile.AnyProfileView
+  moderationOpts: ModerationOpts | undefined
   children: React.ReactNode
 }) {
   const viewRef = useRef(null)
@@ -32,6 +35,12 @@ export function ActionsWrapper({
   const {t: l} = useLingui()
   const convo = useConvoActive()
   const {currentAccount} = useSession()
+  const primaryMember = useMaybeProfileShadow(convo.convo.primaryMember)
+  const reactionsAvailable = canReact({
+    convoState: convo,
+    primaryMember,
+    moderationOpts,
+  })
 
   const [showActions, setShowActions] = useState(false)
 
@@ -93,29 +102,34 @@ export function ActionsWrapper({
             : [a.ml_xs, {marginRight: 'auto'}],
           hasReactions ? [a.mb_2xl] : undefined,
         ]}>
-        <EmojiReactionPicker message={message} onEmojiSelect={onEmojiSelect}>
-          {({props, state, IS_NATIVE, control}) => {
-            // always false, file is platform split
-            if (IS_NATIVE) return null
-            const showMenuTrigger = showActions || control.isOpen ? 1 : 0
-            return (
-              <Pressable
-                {...props}
-                style={[
-                  {opacity: showMenuTrigger},
-                  a.p_xs,
-                  a.rounded_full,
-                  (state.hovered || state.pressed) && t.atoms.bg_contrast_25,
-                ]}>
-                <EmojiSmileIcon
-                  size="md"
-                  style={t.atoms.text_contrast_medium}
-                />
-              </Pressable>
-            )
-          }}
-        </EmojiReactionPicker>
-        <MessageContextMenu message={message} senderProfile={senderProfile}>
+        {reactionsAvailable && (
+          <EmojiReactionPicker message={message} onEmojiSelect={onEmojiSelect}>
+            {({props, state, IS_NATIVE, control}) => {
+              // always false, file is platform split
+              if (IS_NATIVE) return null
+              const showMenuTrigger = showActions || control.isOpen ? 1 : 0
+              return (
+                <Pressable
+                  {...props}
+                  style={[
+                    {opacity: showMenuTrigger},
+                    a.p_xs,
+                    a.rounded_full,
+                    (state.hovered || state.pressed) && t.atoms.bg_contrast_25,
+                  ]}>
+                  <EmojiSmileIcon
+                    size="md"
+                    style={t.atoms.text_contrast_medium}
+                  />
+                </Pressable>
+              )
+            }}
+          </EmojiReactionPicker>
+        )}
+        <MessageContextMenu
+          message={message}
+          senderProfile={senderProfile}
+          moderationOpts={moderationOpts}>
           {({props, state, IS_NATIVE, control}) => {
             // always false, file is platform split
             if (IS_NATIVE) return null
diff --git a/src/components/dms/MessageContextMenu.tsx b/src/components/dms/MessageContextMenu.tsx
index 8e6c470d59..b055d87cc9 100644
--- a/src/components/dms/MessageContextMenu.tsx
+++ b/src/components/dms/MessageContextMenu.tsx
@@ -1,12 +1,17 @@
 import {memo, useCallback} from 'react'
 import {LayoutAnimation, Platform} from 'react-native'
 import * as Clipboard from 'expo-clipboard'
-import {type ChatBskyConvoDefs, RichText} from '@atproto/api'
+import {
+  type ChatBskyConvoDefs,
+  type ModerationOpts,
+  RichText,
+} from '@atproto/api'
 import {useLingui} from '@lingui/react/macro'
 import {useQueryClient} from '@tanstack/react-query'
 
 import {useGoogleTranslate} from '#/lib/hooks/useGoogleTranslate'
 import {richTextToString} from '#/lib/strings/rich-text-helpers'
+import {useMaybeProfileShadow} from '#/state/cache/profile-shadow'
 import {useConvoActive} from '#/state/messages/convo'
 import {useLanguagePrefs} from '#/state/preferences'
 import {unstableCacheProfileView} from '#/state/queries/unstable-profile-cache'
@@ -27,15 +32,17 @@ import {useAnalytics} from '#/analytics'
 import {IS_NATIVE} from '#/env'
 import type * as bsky from '#/types/bsky'
 import {EmojiReactionPicker} from './EmojiReactionPicker'
-import {hasReachedReactionLimit} from './util'
+import {canReact, hasReachedReactionLimit} from './util'
 
 export let MessageContextMenu = ({
   message,
   senderProfile,
+  moderationOpts,
   children,
 }: {
   message: ChatBskyConvoDefs.MessageView
   senderProfile?: bsky.profile.AnyProfileView
+  moderationOpts: ModerationOpts | undefined
   children: TriggerProps['children']
 }): React.ReactNode => {
   const {t: l, i18n} = useLingui()
@@ -52,6 +59,13 @@ export let MessageContextMenu = ({
   const isFromSelf = message.sender?.did === currentAccount?.did
   const isGroupChatEnabled = ax.features.enabled(ax.features.GroupChatsEnable)
 
+  const primaryMember = useMaybeProfileShadow(convo.convo.primaryMember)
+  const reactionsAvailable = canReact({
+    convoState: convo,
+    primaryMember,
+    moderationOpts,
+  })
+
   const onCopyMessage = useCallback(() => {
     const str = richTextToString(
       new RichText({
@@ -116,7 +130,7 @@ export let MessageContextMenu = ({
   return (
     <>
       <ContextMenu.Root>
-        {IS_NATIVE && (
+        {IS_NATIVE && reactionsAvailable && (
           <ContextMenu.AuxiliaryView
             align={isFromSelf ? 'right' : 'left'}
             style={[isFromSelf && isGroupChatEnabled ? null : a.ml_sm]}>
diff --git a/src/components/dms/MessageItem.tsx b/src/components/dms/MessageItem.tsx
index 49ae4ec7fa..184a16afaa 100644
--- a/src/components/dms/MessageItem.tsx
+++ b/src/components/dms/MessageItem.tsx
@@ -437,7 +437,8 @@ let MessageItem = ({
               hasReactions={hasReactions}
               isFromSelf={isFromSelf}
               message={message}
-              senderProfile={profile}>
+              senderProfile={profile}
+              moderationOpts={moderationOpts}>
               {AppBskyEmbedRecord.isView(message.embed) && (
                 <MessageItemEmbed
                   embed={message.embed}
diff --git a/src/components/dms/util.ts b/src/components/dms/util.ts
index 6f11a5c973..89b9c5b01f 100644
--- a/src/components/dms/util.ts
+++ b/src/components/dms/util.ts
@@ -1,7 +1,15 @@
-import {type $Typed, ChatBskyActorDefs, ChatBskyConvoDefs} from '@atproto/api'
+import {
+  type $Typed,
+  ChatBskyActorDefs,
+  ChatBskyConvoDefs,
+  moderateProfile,
+  type ModerationOpts,
+} from '@atproto/api'
 
 import {EMOJI_REACTION_LIMIT} from '#/lib/constants'
 import {logger} from '#/logger'
+import {type Shadow} from '#/state/cache/profile-shadow'
+import {type ConvoState, ConvoStatus} from '#/state/messages/convo/types'
 import * as bsky from '#/types/bsky'
 
 export const MESSAGE_GAP_THRESHOLD_MS = 60 * 60 * 1000
@@ -31,8 +39,9 @@ export function canBeAddedToGroup(profile: bsky.profile.AnyProfileView) {
     case 'all':
       return true
     case 'following':
-    case undefined:
       return Boolean(profile.viewer?.followedBy)
+    case undefined:
+      return canBeMessaged(profile)
     default:
       return false
   }
@@ -73,6 +82,55 @@ export function hasReachedReactionLimit(
   return myReactions.length >= EMOJI_REACTION_LIMIT
 }
 
+/**
+ * Whether the active conversation accepts emoji reactions. Reactions are
+ * unavailable when:
+ * - the convo is in the disabled state
+ * - a group convo is locked or permanently locked
+ * - 1-1: the other user is blocked or is blocking us
+ * - group: we are blocking the primary member (the owner)
+ */
+export function canReact({
+  convoState,
+  primaryMember,
+  moderationOpts,
+}: {
+  convoState: ConvoState
+  primaryMember: Shadow<bsky.profile.AnyProfileView> | undefined
+  moderationOpts: ModerationOpts | undefined
+}): boolean {
+  if (convoState.status === ConvoStatus.Disabled) {
+    return false
+  }
+
+  if (!convoState.convo) {
+    return true
+  }
+
+  if (convoState.convo.kind === 'group') {
+    const {lockStatus} = convoState.convo.details
+    if (lockStatus === 'locked' || lockStatus === 'locked-permanently') {
+      return false
+    }
+  }
+
+  if (primaryMember && moderationOpts) {
+    const moderation = moderateProfile(primaryMember, moderationOpts)
+    if (convoState.convo.kind === 'direct') {
+      // Either direction (blocking or blocked-by) hides reactions in 1-1s
+      if (moderation.blocked) return false
+    } else {
+      // In groups, only "we are blocking" the owner hides reactions
+      const isBlockingPrimary = moderation
+        .ui('profileView')
+        .alerts.some(alert => alert.type === 'blocking')
+      if (isBlockingPrimary) return false
+    }
+  }
+
+  return true
+}
+
 export type GroupConvoMember = ChatBskyActorDefs.ProfileViewBasic & {
   // can be missing if account deleted
   kind?: $Typed<ChatBskyActorDefs.GroupConvoMember>