I'm finding quite often that unregistered users hide behind their anonymous identity and edit pages with filth. I've had to go in and fix a few pages, cause it seems not enough people check the pages that often, or thoroughly.
Personally, I believe we should restrict unregistered users from editing this wiki. That or motivate more people to frequent the wiki, and clean up garbage people leave behind. I'm up for either option, but i find the first would be convenient..