With laws against minors being what they are, jail isn't an option. Some sort of probation or community service maybe... Really though it should be enforced on the parents, not the child. This sort or behavior isn't something they just spontaneously develop. It's taught at home. It could be directly or indirectly taught by the parents bullying the kids playfully or indirectly by the parents not punishing the siblings as they bully each other. My daughter has a younger uncle and grandpa that use a sort of picking on or bullying as a way to "play" with her. Needless to say they are not allowed alone with her and are swiftly corrected by me when they try to "play" with her.