I deleted over one thousand spam pages out of the wiki
tonight. The wiki has been so hammered by spammers that this is the reason you have to contact Whasf in order to get a wiki account. To put in in perspective, when I started deleting them earlier today the wiki was at 4,199 pages. So I just dropped nukes on approximately 1/4 of the wiki, and I'm not even done yet.
If you have a wiki account I've made a template users can tag pages they come across that should be deleted, which automatically adds the pages to a category containing all pages up for deletion.
You don't actually have to change the page other than to add that line. If you have a reason other than spam you can replace that with your actual reason. Just placing that into a page does the deed. If you don't have an account but would like one, talk to Whasf.
Measure to prevent spammers from signing up are still under consideration, I and whasf spoke about it a few times.