diff --git src/bp-activity/classes/class-bp-activity-activity.php src/bp-activity/classes/class-bp-activity-activity.php
index a4e82ba..7fad5ee 100644
--- src/bp-activity/classes/class-bp-activity-activity.php
+++ src/bp-activity/classes/class-bp-activity-activity.php
@@ -537,6 +537,7 @@ class BP_Activity_Activity {
 			'activities'     => null,
 			'total'          => null,
 			'has_more_items' => null,
+			'stream_mode'    => $r['display_comments'],
 		);
 
 		/**
diff --git src/bp-activity/classes/class-bp-activity-template.php src/bp-activity/classes/class-bp-activity-template.php
index 864e551..740bcd7 100644
--- src/bp-activity/classes/class-bp-activity-template.php
+++ src/bp-activity/classes/class-bp-activity-template.php
@@ -248,6 +248,9 @@ class BP_Activity_Template {
 
 		$this->has_more_items = $this->activities['has_more_items'];
 
+		// Add the stream mode to inform how activity comments are displayed
+		$this->stream_mode = $this->activities['stream_mode'];
+
 		$this->activities = $this->activities['activities'];
 
 		if ( $max ) {
diff --git src/bp-members/bp-members-filters.php src/bp-members/bp-members-filters.php
index 5575ebe..14d4e4a 100644
--- src/bp-members/bp-members-filters.php
+++ src/bp-members/bp-members-filters.php
@@ -127,3 +127,27 @@ function bp_members_edit_profile_url( $url, $user_id, $scheme = 'admin' ) {
 	return apply_filters( 'bp_members_edit_profile_url', $profile_link, $url, $user_id, $scheme );
 }
 add_filter( 'edit_profile_url', 'bp_members_edit_profile_url', 10, 3 );
+
+
+/**
+ * Makes sure to avoid duplicate comments on the Just Me scope.
+ *
+ * @since  2.6.0
+ *
+ * @param  bool $can_comment True if the user can comment the activity. False otherwise.
+ * @return bool              Unchanged if Activity stream mode is not 'stream'. False otherwise.
+ */
+function bp_members_comments_avoid_duplicates( $can_comment ) {
+	global $activities_template;
+
+	if ( 'stream' === $activities_template->stream_mode && bp_is_current_action( 'just-me' ) ) {
+		if ( ! empty( $activities_template->activity->children ) ) {
+			$activities_template->activity->children = array();
+		}
+
+		$can_comment = false;
+	}
+
+	return $can_comment;
+}
+add_filter( 'bp_activity_can_comment', 'bp_members_comments_avoid_duplicates' );