I even had it in my 6th grade class (and I'm 31). Only after that did I notice a kid in my class had cigerette burns on his arms. I thought at the time maybe his parents did it to him.
Course, that was in California - always more progressive than most other places.
But it may be time some one tells them that they are contributing to the problem. that instead, teachers should notice such injuries and send the kids to talk to counselors about it.
Good questions Mckell