Well, my experience with FiB clan members goes back to the Battlefield 2 days. They've been known for spawn raping and generally bad sportsmanship tactics. They've been accused countless times of hacking, and I have to be honest when I say that I would never be surprised if it was ever proven to be true. They just generally ruin the game when they're online - it's NEVER a pleasant experience playing with/against them.
Maybe it's because they really are "that" good, but most of the time, their attitude and tactics stink. I have never played a single game where FiB are involved and it ended up being an enjoyable experience. They actually remind me of school yard bullies. But that's my view. I'm not affiliated with a clan, so I'm free to voice my opinion.