Index: bp-activity/bp-activity-functions.php
===================================================================
--- bp-activity/bp-activity-functions.php	(revision 9)
+++ bp-activity/bp-activity-functions.php	(working copy)
@@ -669,7 +669,7 @@
 
 	// Check to see if the parent activity is hidden, and if so, hide this comment publically.
 	$activity = new BP_Activity_Activity( $activity_id );
-	$is_hidden = ( (int)$activity->hide_sitewide ) ? 1 : 0;
+	$is_hidden = ( (int)$activity->hide_sitewide ) ? true : false;
 
 	// Insert the activity comment
 	$comment_id = bp_activity_add( array(
Index: bp-activity/bp-activity-template.php
===================================================================
--- bp-activity/bp-activity-template.php	(revision 9)
+++ bp-activity/bp-activity-template.php	(working copy)
@@ -288,7 +288,7 @@
 
 		// are we displaying user specific activity?
 		if ( is_numeric( $user_id ) ) {
-			$show_hidden = ( $user_id == $bp->loggedin_user->id && $scope != 'friends' ) ? 1 : 0;
+			$show_hidden = ( $user_id == $bp->loggedin_user->id && $scope != 'friends' ) ? true : false;
 
 			switch ( $scope ) {
 				case 'friends':
Index: bp-activity/bp-activity-classes.php
===================================================================
--- bp-activity/bp-activity-classes.php	(revision 9)
+++ bp-activity/bp-activity-classes.php	(working copy)
@@ -115,9 +115,15 @@
 			$sort = 'DESC';
 
 		// Hide Hidden Items?
-		if ( !$show_hidden )
-			$where_conditions['hidden_sql'] = "a.hide_sitewide = 0";
+		if ( !is_bool( $show_hidden ) && !empty( $show_hidden ) )
+			$visibility = $show_hidden;
+		elseif ( !$show_hidden )
+			$visibility = '0';
+		else
+			$visibility = '0, 1';
 
+		$where_conditions['hidden_sql'] = "a.hide_sitewide IN ({$visibility})";
+
 		// Exclude specified items
 		if ( $exclude )
 			$where_conditions['exclude'] = "a.id NOT IN ({$exclude})";