I’ve pretty much clamped down my Facebook account, no picture access, nobody can post on my wall, etc. I’ve found recently that a lot of the people I reconnected with on there, there was a reason we disconnected in the first place. Some people I just don’t care to be friends with as an adult. I mostly just keep it in case someone whom I don’t see or talk to regularly can get a hold of me easily.
Twitter I just don’t find useful to me in any way.