http://bugs.winehq.org/show_bug.cgi?id=33470
--- Comment #7 from Dmitry Timoshkov dmitry@baikal.ru 2013-05-16 19:42:19 CDT --- (In reply to comment #6)
There's always the nuclear option: disable new user registration, and have people manually request accounts.
glibc did this recently, see http://sourceware.org/glibc/wiki/HomePage#EditingTheWiki
I think that's actually acceptable for Wine wiki as well. According to http://wiki.winehq.org/RecentChanges there is maybe 1 or 2 new real wiki users in several months (I'd say an year), so making new user accounts go through moderation is not going to create any problem.