I don't think there were many metal detectors installed in schools 15-20 years ago...=P
Drugs and pregnancy, nothing new there. I think clothing kids wear isn't appropriate for school. I mean, I really don't care if someone wants to look at my boobs, but I find it distracting from learning or working, so you know, I just don't wear those tops to the office. But watch out when I go out!
The flip side to looking at how that age group has changed is also to look at the parents...has parenting generally gotten better or worse? It's a good question.