Spam in the wiki has been a problem for quite awhile, from what I've noticed. Every single day there are accounts created and pages made just for spam. Cygma and Skywalker do a great job of keeping up with it every day, but obviously they can't watch it 24/7.
It's too bad it happens at all. Hopefully the admin-approval will take care of the problem and not become a terrible hunt through account creation requests to find that one legitimate user.