Trolls

Why do trolls try to get banned? I've been at a couple of sites recently where someone bragged about creating so much trouble on someone else's site that the person had been banned. That behavior leaves me scratching my head. What is the point?

I'm sure if you want, you can get banned pretty quickly at most sites. But I fail to see the point of that. When I go to liberal sites, I like to argue and debate a topic or else drop a comment and move on. I can't imagine being proud of being such an annoying jerk that you get banned.