There is only one social networking site I've found useful, and that is LinkedIn. But then it isn't really about "social" networking but cultivating professional contacts. Facebook seems like a clossal waste of time.

I can think of several other ways to waste my time without jumping on the social network bandwagon. I have looked at a couple of these sites and found nothing compelling to make join them let alone live my sad existence through them. Perhaps it is because I am socially inadequate or just because I see the pointless marketing angle and refuse to join in, but I will not use any social network site.

I think these types of sites have SOME value if you're stuck inside on rainy days and have absolutely, positively NOTHING else to do, or if you're just curious (as I was just now), or can't bear face to face socialization for whatever reason, but, well, I'm not terribly enamored with them, nor can I say I frequent any of them much at all! I've got too much going on in my life to care about them. Now youtube! Well we're talkin' whole 'nother animal!