I go to BFL forums everyday just to read all the "hating" posts. I don't see what you guys are talking about with them banning folks that are against them. More people post about hating them than liking them. Just to let you know I'm not a BFL lacky...it's just entertaining to read "troll" posts. 
They're cracking down on it. Its more common in the Blog comments. Especially if you comment in the shoutbox too. I've talked to several recent bannees who barely say a word or more about Josh or Jody that got banned.