The vandalism issue has been reported to the VSTF wiki. One of them will take care of it as soon as possible I'm sure.
I think you all should remember please don't feed the trolls. Sending them messages like "GET THE HECK OFF THIS WIKI!!!!!!!" or "BRERJAKE90 WILL BLOCK YOUR BUTT FROM THIS WIKI!!!" will only inflame them and make them happier to vandalize the wiki. In addition, if sending an admin one message does not get his attention, sending him a thousand won't work either.
Revert the trolls' edits as quickly as you can. Without blocking ability, and having already contacted the VSTF, that's as much as you can really hope for.