I don't foresee such things happening in our local school system, when our son starts.
If something similar were to occur, I would have a very hard time not showing the adults who did such a thing to a child what it feels like to be intimidated. Of course, I would do my best not to do or say anything actionable.... But I am one of those guys who normally looks (and is) puppy-dog friendly, but people tend to get out of my way in a hurry when I am angry.
Call it the Sicilian scowl.
Somebody in a position of authority intimidating any little kid, let alone one from my family, would make me very angry.