CNN disabled their comment page too
They were tired of posting news stories about gay folks and black folks and having viscous arguments ensue. It's one thing to have your own beliefs, but there is a way to express them in a civil manner. I think IMDB is tired of people who are hateful or nasty. It's uncalled for. The message boards are a way to discuss points of a movie, not how much you might hate or dislike certain people or things.
"Duh. You're the idiot. Not me."