I deactivated my Facebook account. Not because I spent so much time on it - I barely used it at all. When I signed up it was so I could see what the kids were up to and I have enjoyed that part.
When I signed up I used my maiden name as well as my married name in case I was being searched out by old friends. I never did hear from anyone I wasn't in some sort of contact with already. I occasionally put things up about family and political stuff, but when I looked at it yesterday it was full of ads and stuff from sites I had "liked" for some reason or the other (discounts mostly) and it just bothered me.
The final issue was that I couldn't seem to edit things off the page. Because I sometimes blog about work, I didn't want my employers name available to match up, just in case someone at work found my blog. I could not get it to delete anything that was already there. I could change the status of my employment or stop some people from seeing some stuff, but that isn't what I wanted. I should be able to control the "about me" info, and couldn't. Okay, maybe there is a way, but I am not asking for help. If they make it so difficult to manage my own information, I don't want to participate.
Also, if I don't want unflattering photos of myself on my page, I should be able to delete them - so, okay, vanity played a part, too!