As a counselor I see all type and manner of teens in my office. Some with life adjustment issues, some with life and death issues. Now, there is one issue in particular that has been coming up more and more. That would be how kids are using social networking to cyber bully one another 24/7.
In the old days, if there was a bully messing with you at school - even if the teacher didn't do anything about it - at least you could (generally) go home and have a break from the peer persecution. Not any more.
I have young people all but emotionally undone in my office because near-strangers from a school with thousands of kids in attendance took to Twitter to tell their "followers" that the targeted teen was a "loser."