Self harm does seem to be on the increase, including cutting and starving. My experience of working with teenage girls in care homes was that if one started cutting, there would be an outbreak with other young women (usually young women) joining in.
The prevalence of internet sites about cutting/anorexia may have a similar effect, that is of normalising self harm as a means of helping to contain or control feelings that are otherwise overwhelming.
I watched a bit of Big Brother this afternoon (visiting someone, I'll say no more). I was genuinely shocked again by the extent of dramatic, competitive acting out. The swearing, the aggressive, volatile behaviour of all involved. I am familiar with the argument that eg. violent video games don't encourage young people to act them out But, honestly - if "entrainment' is primarily this kind of no wonder young people struggle to deal with the difficulties that go with growing up.