For myself I would be very upset at the school but I agree, I would be asking my child what she thinks she was doing! This is what happens when we don't allow children freedom to play alone and unsupervised at home. They aren't being taught the skills they need so when they are let out somewhere that they aren't fenced in they think it is OK to go exploring. They aren't taught to respect boundaries because they likely have helicopter parents who watch every move they make and they aren't learning to think on their own. By the mother's reaction that child is learning to blame other's for his actions. He should have been disciplined and mom should be talking with the school director without him present!