@sysadmins: you should add "http://apps.facebook.com/herogift/?ftype=flyfish&uid=100001846892713" or better "http://apps.facebook.com/*" to the filter, that would be stop Mr. herogift...
It won't actually stop the bot since it will still be able to make new accounts and post the links. The links just won't work. It changes nothing, really.