A.S.
Interesting discussion of pervasive childhood allergies in this book: "Healing the New Childhood Epidemics - Autism, ADHD, Asthma & Allergies" by Kenneth Bock, MD and Cameron Stauth.
IMHO (and I'm not a health care provider of any sort) - what we see today is absolutey NOT normal.
I had an acquaintance with a son with Type 1 diabetes (another growing disorder among children). While at school, he was held down by some other boys and forced to eat some sort of candy (pop rocks??).
It's disgusting, and potentially deadly, behavior that must be dealt with harshly.