Lilmod…………
You do not live in the liberal northeastern US.
Very often, busybody strangers will call Children’s Protective Services if they see an adult hit a child (even a potch on tuchas). CPS (DCG here in CT) MUST then conduct an investigation, as they are charged under the law.
The investigation can cause duress, and the end result is that the parent did nothing wrong. But why subject yourself to the process if it can be avoided.