Sometime back I posted (prophetically on hindsight) on Wiki Spam - A Disaster waiting to happen in this blog. Please refer to the article for an interesting discussion on the subject and potential solution space. At that time Mike Cannon-Brookes of Atlassian commented and I quote: As for the “disaster waiting to happen” - c2 gets attacked, wiped, deleted etc regularly, yet it is still around and still full of useful content - that is the best indication to me that it works :)