If you go by the media take on it, the chief danger to young people of sites like MySpace is the possibility of their encountering online predators of various kinds. Sort of the online equivalent of not getting into a stranger's car, sort of fing.
But an interesting, and I think significant, aspect of the Megan Meier case is that everyone involved knew each other. They were acquaintances, neighbors, and at one point even friends.
There are certain kinds of crimes where the perpetrator is likely to be known to the victim. I know that right now, the county prosecutor isn't sure whether criminal charges can be filed in this case, but the ways in which it resembles what could be called, for lack of a better term, "real world" crimes (as though the Internet weren't in the real world) should not be dismissed.
We're going to see more stories like this. I hope they won't be this tragic.