function onEndDeleteUser($action, $user)
 {
     if ($action->boolean('blacklisthomepage')) {
         $pattern = $action->trimmed('blacklisthomepagepattern');
         Homepage_blacklist::ensurePattern($pattern);
     }
     if ($action->boolean('blacklistnickname')) {
         $pattern = $action->trimmed('blacklistnicknamepattern');
         Nickname_blacklist::ensurePattern($pattern);
     }
     return true;
 }