I do think if parents have some unusual complaint with a member of the administration of the school, that shouldn't alter the chain of command and authority the child should respect ion the school. Go in and talk to see what happened. Then if discipline is warranted, but oyu still feel you don't want "anyone to touch your child", fine. YOU paddle your child in the presence of the administer or teacher, so the student knows they didn't "get away" with Mom coming to the rescue. But the student MUST suffer consequence of the action and it must be as severe or more severe than the school's action.