The girl probably did make the right choice for herself if she didn't have the fortitude to just ignore people on myspace. However she was young and might have grown out of it given time so I would also blame the parents some for letting her be alone when she was that vulnerable, but who would have expect their daughter to kill herself over myspace?

I have to give the girl props for hanging her self instead of doing something dumb like taking lots of over the counter pain killers though, if you're going to do something, do it right.