1) No one can post on my wall
2) No one can tag me in pictures, post or places.
3) My profile picture excludes my face.
4) I post little to nothing.
5) I only friend a narrow group of people. Being an offline friend of mine for years is not enough.
6) People who make weird comments are unfriended quickly.
7) The list goes on, but it can be summarized as do as little on FB as possible.
My best friends, most of my girlfriends, my family -- I am not friends with on FB!
You can have a FB account and maintain some basic degree of privacy. It probably is not the way Mark Zuckerberg intends it. The more he does to interfere with my usage patterns, the less I use FB (and I hold him ultimately responsible for the UX.) I expect to continue to lose control over my account in the future. The more this occurs, the less I'll use it.
Strangely, over the past year I have begun to really enjoy and understand using Twitter.