by VanessaE » Thu May 16, 2013 11:35
It's because each of these people has found something they dislike about the games, the engine, or more commonly the core developers. Each of these people has, in turn, done the most childish thing possible and rage-quit, blanking-out many of their posts in the process in some cases (particularly, posts where they've published a mod).
Blanking out your posts like that is a bannable offense as it is, which is only compounded by some people expressly demanding a ban.