I've just had an experience I never thought I'd have again; an edit war over Nibiru. I wrote and maintain Wikipedia's article on the whole "Planet X-Nancy Lieder-Nibiru" thing and someone just tried to delete a link to the Bad Astronomy website and add a link to a site supporting the Nibiru cataclysm. When I reverted him, he changed it back with the comment "Phil Plait is denying climate change". Now this is an odd comment to make because I've seen articles he wrote on Slate denouncing climate change denial. I was wondering how this could have entered his head.