The idea that some kinds of information are more or less suitable for privacy controls is nonsensical. Say some college kid Bob is gay, but he hasn't told his parents. Bob goes to some fan page for a local GLBT organization etc, and 'becomes a fan', because previously that didn't show up on his profile where his parents might see it, and his parents wouldn't be visiting that fan page anyway. Well, now FaceBook goes and makes fan pages visible on your profile, and suddenly Bob's parents have a lot of questions for him.
You may not find yourself in that kind of situation often, but it is a very real possibility -- there was even a study done where a computer could make a highly accurate guess of whether you were gay just by looking at who is in your friends list (also public), without any information from your profile. Everything on facebook is information.
I could give you an example where the bumper sticker is also relevant, but I think the example above is enough to prove my point.