[user104658]

My daughter only has one friend who is regularly smacked / spanked, and that friend is the only one who regularly hits / deliberately hurts my daughter and her other friends when they don't do what she wants.

Violence breeds violence, full stop. If you don't have the smarts to negotiate with a child and get them to understand verbally without getting physical, then don't bother having them in the first place.

"In My Opinion"