I think it's mostly because the guy is harmless. Yeah, he's a gimmick poster which is technically against the rules, but he's not going out of his way to offend anyone, spamming in threads, or harassing people.
I guess so. I don't mind him too much, it just seems like his entire getup is to annoy people so he can laugh at it. Which if I'm not mistaken is the definition of a troll.