I found this thread interesting. I do have Facebook but I only have a small group of friends on there. I use it to play scrabble and words with friends and keep up with a few people. It serves a purpose but it is not my life.
I do not know if FB still does this, but once when I moved and changed my town....FB put me on a website that broadcasted my single status. (who's single in (name of town) and I was contacted by people in that town...arggg. The problem with FB is that they have so much info about you and they can use it as they wish.

So I made sure that my status was not revealed on FB ever again.