public function execute()
 {
     parent::execute();
     $entry = new BashEntryEditor($this->entryID);
     if ($entry->entryID == 0) {
         throw new IllegalLinkException();
     }
     if ($entry->hasVoted()) {
         throw new PermissionDeniedException();
     }
     $entry->vote(false);
     if (!isset($_REQUEST['ajax'])) {
         HeaderUtil::redirect(BASHCore::getSession()->lastRequestURI, false);
     }
 }