thanks for the summary
and while it's true that pretty much everyone has a facebook/cellphone/email account/INTERNETSITEHERE, it's hardly necessary for early childhood growth.
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To be honest, I don't know how much socializing I really do on facebook. Other than going back and forth with a few close people, I've never bothered doing much on it in terms of real socialization.
Some environments don't rely on it as much, especially once you get a pretty good network of friends in one place. For me, this would be my college campus. I didn't even bother getting a FB profile until one of my good friends starting moving away during the summer. I'm sure I'll ramp up FB use when I move off-campus, but at this point, I still don't see it as a "necessity".