I am dealing with ridiculous levels of SPAM. I have changed my wiki to be registered users only but that hasn't seemed to helped any. In one day these SPAM bots will add over a hundred pages of SPAM wiki entries without an easy way to remove them. Each one needs to be deleted individually and each deletion takes 8 clicks to process. It takes significantly more effort to remove SPAM than it does to add it.
Is there any easier way to mass delete SPAM entries? Is there Akismet or some sort of anti-SPAM plugin I can install? Likewise are there any CAPTCHAs or something I can implement to deter spammers further?