I don't use FB anymore. I'm too impulsive about speaking my mind when I'm in a mood, rant too much when I'm hypomanic, get paranoid about who can see what, get too distracted by stupid stuff, and get caught up in drama way too easily. I was never actually being myself, and the free riding "look but don't touch" strategy defeats the purpose to me.

De-activating my FB account was one of the better decisions I've made for my mental health and stress levels. I have only very rarely regretted it, largely because people no longer announce things in other venues because they assume everyone's on FB, or I don't have their contact info.

But... I do use Twitter a lot. I actually have 3 accounts: anonymous public (crazy tweets!), non-anonymous public (professional), and non-anonymous private (friends only). All too often it's pretty much the extent of my social interaction.