Being drunk (and possibly drugged by others) does not give other people license to do what they want with your body. I thought we all understood that now.
Having said that, I'm glad the perpetrators were tried of juveniles. Of course lots of other juveniles who should be tried as juveniles are tried as adults. I don't think - and Teh Science seems to support this - that teenage brains are anything near wired up correctly yet. That doesn't mean there should be no punishments for egregious crimes, just that it is best that we have this thing called the Juvenile Justice System that is separate from the adult system.
My brain wasn't wired up right when I was a teenager. I'd certainly like to think I wouldn't have done what these kids did. I'm pretty sure that's true. Sadly, if I had been there and been 15, I'm not sure I would have seen it as being as bad an act as it was, and I certainly can't claim to know that I would have done anything to intervene. Maybe I'm selling my teenage self short. But I don't know.