Violence is not binary. A light slap in the face can be very beneficial for snapping hysterical children out of tantrums. This is proven! Caning people for mistakes humiliates them, and creates in them, the desire for vengeance. Violence at that level, breeds violence. They will hit their children, who will hit their children in turn, and on and on it goes. This is also proven!
I say, remove the naughty children and put them in work/vocational training. Life will punish them enough, later on, if they do not change their ways.
Another way is to punish the parents of naughty children. They are, ultimately, responsible, and if they raised bullies, they should be punished.
> A light slap in the face can be very beneficial for snapping hysterical children out of tantrums
Even “light” physical punishment is not proven beneficial. The research generally does not find a safe beneficial threshold where hitting becomes good if mild enough; it finds that physical punishment may suppress behavior briefly but is associated with worse outcomes over time. “Light” changes the severity, not the evidence.
Well, one of my formative memories while being a child at school contributes to it, I was once saying some mean thing to another child because of other kids, that child slapped my face back quite good, I don't remember what I was saying, just that it was mean and that the slap made me question "why was I being mean for no reason?", an epiphany which helped me greatly.
On the other side of things, I do remember having suffered some forms of violence from parents and those really did not contribute to anything than showing me why they were bad parents.
That slap was not official punishment. You were interacting with a peer. It's different from what's being discussed here.
Beat up their dad