I think you may be using violence to mean any kind of bullying, which is a little vague. Teenage girls certainly engage in a lot of bullying, but very little physical violence, perhaps even less so in the rich private school environment I was in. I'm sorry you don't believe me. And I think claiming that not-rape would be extraordinary is pretty solidly in line with saying that rape is normal, yes.
To me the thread illustrates that for a community that gives so much lip service to disruption and progress, a lot of people are really unwilling to put up with the idea that high school shouldn't have to be the pit of misery that is apparently common in American public schools. But über is solving real problems!