function bp_legacy_theme_spam_activity() {
	$bp = buddypress();

	if ( ! bp_is_post_request() ) {
		return;
	}

	// Check that user is logged in, Activity Streams are enabled, and Akismet is present.
	if ( ! is_user_logged_in() || ! bp_is_active( 'activity' ) || empty( $bp->activity->akismet ) )
		exit( '-1' );

	// Check an item ID was passed.
	if ( empty( $_POST['id'] ) || ! is_numeric( $_POST['id'] ) )
		exit( '-1' );

	// Is the current user allowed to spam items?
	if ( ! bp_activity_user_can_mark_spam() )
		exit( '-1' );

	// Load up the activity item.
	$activity = new BP_Activity_Activity( (int) $_POST['id'] );
	if ( empty( $activity->component ) )
		exit( '-1' );

	// Check nonce.
	check_admin_referer( 'bp_activity_akismet_spam_' . $activity->id );

	/** This action is documented in bp-activity/bp-activity-actions.php */
	do_action( 'bp_activity_before_action_spam_activity', $activity->id, $activity );

	// Mark as spam.
	bp_activity_mark_as_spam( $activity );
	$activity->save();

	/** This action is documented in bp-activity/bp-activity-actions.php */
	do_action( 'bp_activity_action_spam_activity', $activity->id, $activity->user_id );
	exit;
}