"mindless young kids who join groups aimlessly, post pictures of the almost daily college parties, and find joy in spamming friends' walls"
this is so condescending, how about just saying there are millions of people that enjoy facebook and use it a lot.
The reason I used that line is because that's the differentiating point between why a community like the one here doesn't see the value in Facebook, and why millions of kids do. Sure, Facebook serves other valuable purposes like the one it serves me, but where Myspace and Facebook get their click intensive users are from mindless kids.
You can't just say millions of people enjoy it, because within that group, there are many varying segments that play varying degrees of significance in contributing to why Facebook is successful. And the mindless groups of kids who join groups aimlessly, having that show up on their news feed, and having their friends join, ultimately creating this huge domino effect of clicks, is probably what contributes the most.