The correct response to that is to remove every hair follicle on the teacher's body with a blowtorch.Things sure have changed. When I was a kid, all the catholic kids I knew talked about being beaten with rulers and made to kneel on their hands by the nuns. When I was in grade school (5th-6th), one of the kids had early facial hair and had grwn big sideburns. The gym teacher ordered him to cut them off but he never did so one day in gym class locker rom the teacher and a couple kids held him down and the teacher totally shaved ONE of his sideburns off! All the other kids laughed at him in class. He took it in stride.
The next day he came in with both sideburns shaved off and that was the end of it. The teacher was never fired and I heard no more about it from the school or the parents. The boy never grew the sideburns back and was a healthy, normal and popular kid.
That, or simply nail him to a tree and leave him there.