So, having been the target myself of libel in the Wikipedia article about me, I've been trying to protect an article about a fellow activist here in Ottawa, Denis Rancourt. Over the last couple of months, a bunch of rabid right-wingers (two of whom appear to be one-purpose accounts started specifically for the purpose of doing a hatchet-job on Rancourt) have removed 90%+ of the original content of the article after having failed to get the article deleted, and replaced it with material designed to make Rancourt look like a nutcase. For instance, after Rancourt was banned from entering his lab at the university, they added a statement out of the blue to his article that the lab contains radiactive materials, the implication being that Rancourt is dangerous and violent and likely to do something with access to such material.
Now the tactic they're using is to paint Rancourt as an anti-semite because he objects to Israeli nationalism. This is rather a big deal, because in Canada it is a criminal offence to make hate speech, and the Wikipedia article now effectively accuses him of commission of a crime. When repeated reverts of this material did nothing, I (foolishly) posted an article on the BLP noticeboard asking for assistance. The result is now *more* people adding the material to the article, and JoshuaZ threatening to ban me for reverting it.
Enough is enough. If no one here can suggest a better solution, I think I'm going to call Rancourt and see if I can convince him to file a claim against WMF.