You're talking as if children are killing themselves over internet bullying left and right. The truth is this almost never happens and when it does is almost certainly bullying from the real world spilling over into the virtual.
The internet has opened a lot of doors and changed some of the rules, but I don't believe it has turned the playing field upside down as sensationalist news articles would like us to believe.
If anything, as the web has matured as a technology and as a part of life things are probably getting better, since the rules for how kids need to behave on the web are becoming part of the culture and not something their "pushy parents" are trying to convince them of.
Notice how the interviewed girls talk about giving false personal information and about how they promptly cut off inappropriate contact as if it's the most obvious thing in the world. I'm not sure this was the situation 10 or 15 years ago...