Spam bot invasion
I made CAPTCHA suggestions here.
I believe it is possible that these spammers are not bots, but low-paid humans working in huge "spam farms". A registration CAPTCHA should therefore require at least basic knowledge of Robocode (e.g. name one sample bot).
In any case, nothing is going to happen until Skilgannon wakes up.
Yes registration only CAPTCHA can be easily skipped by low paid humans, however it seems that the spams are created by machines — therefore adding a CAPTCHA when creating/editing pages for new users may help ;)
Given that every new spam user posts about 3 pages and then stop, I would say that bots hacked the CAPTCHA algorithm.
I think we should make registration harder and then we will be fine.