I'm only on FB, I *think* I have most of my privacy settings set as private as I can, and I very, very rarely post anything personal on it. I primarily use it for my business and for buying/selling horses and tack. I usually don't accept friend requests from people I don't know, although I do need to go through and do another "friend cleanup." If you don't *need* FB and you want to get rid of it, go for it! Its not a necessary part of life.