public static function save($message, $user_login = '******')
 {
     if (current_user_can('moderate_comments')) {
         QHShoutboxUser::checkCommand($message, $user_login);
     } elseif (!current_user_can('moderate_comments') && !QHShoutboxUser::checkUser($user_login)) {
         return false;
     }
     self::$wpdb->insert(self::$table, array('user_login' => $user_login, 'message' => htmlspecialchars($message), 'time' => current_time('mysql')));
     return true;
 }