A gang attack is not being "picked on" because one is weak. Mob/group psychology is wholly different from individual psychology and the school has to do the work on this one. Reread Cyran0's original post; it was a GANG of children, most/all of those on the bus who attacked his son while an adult stood by and did nothing. It is not Cyran0 son's problem or a problem that a little karate will help. All the children on that bus are in danger. The driver should be fired and the children individidually counselled and dispersed onto other busses so what they participated in and witnessed together doesn't "stick" to them and get triggered by their being in the same configeration. It's a seriously horrible situation for the school as well as Cyran0, his son AND the other children.