The legal system is meant to be a backstop, not a standard mode of operation. What I despise, and what makes me feel embarassed by proxy, is when the imagined solution involves using the legal system as a deterrent (to either the kids or their parents). I think there's a systemic cultural failure if parents are not emparting proper morals and imposing proper consequences, so much so that we need the law to be involved to protect teacher from harm.