I spend too much time on Facebook as it is. But one thing I try to do is control my Friend list, because it can get out of hand. So one of my purges years ago introduced a new rule that I have to actually know the person in real life. I was making lots of online friends (including many from here, and various predecessors such as the SP subforum of wherever we used to be -- I don't even remember), and it felt weird seeing pictures of people's kids, them hanging out with their friends, talking about stuff, and I've never met any of the people involved.
I have nothing personally against anyone here (at least that I can think of) but Facebook for me is more personal. I know that it's different for a lot of people. For many, Internet friends are just as "real" as folks they grew up with or work with or anything else. I probably interact more with "online only" friends than my buds from school or my family, who are scattered all over the country. But rules are rules.
