Facebook, Myspace, et all are simply symptoms. The suicides linked to these are symptoms, and might have occurred anyhow. The reality is, society as a whole is becoming dehumanized, and anti-social.
Kids don't know their parents, and parents don't know their kids. Family structure has been destroyed. So called progressive thinkers have brought about so many anti-social behaviors that our society continually spirals downward. Feminism pulled our mothers out of their homes, leaving kids in day care centers where they're raised by other people's kids. Discipline was taken away from school authorities, yet teachers are relegated to simply babysitting children because parents are no longer home to discipline properly.
Parents now work so hard, for so many hours, that many of them are out of the home 8 to 10 hours of the day, and when they get home they just want dinner and peace and quiet. There's no more fishing trip with dad, where you can tell him all about the bully at school. No more sewing lessons with mom, where you can tell her about the boys that tease you, or the girls that insult you.
And so our children seek out attention through video games, Facebook, MySpace, drugs, alcohol, teen-sex, and other avenues. And we wonder why kids these days (and even adults) can't handle the stresses of life. They have no support at home, let alone in the mean world that exists without them.
Throw on top of that, the pervasive destruction of moral and religious beliefs in this country (and world), and you find yourself with ilequipped teens who don't even have God to rely on.