User blog comment:Xean/What Works for Your Wiki?/@comment-4480871-20110602151436/@comment-2093602-20110602152027

The active sysops on the wiki are supposed to do this, not the wikia staff. They can block the user and undo his edits.

If there are no active admins, report it to the vstf: http://vstf.wikia.com/wiki/Report:Vandal