Was no bravery, Womble.
True, I have no kids - but I vividly remember my own childhood - and I was physically very violent from age 11-16. Yep, you read correctly. I was punished severly by teachers (knuckles/cane, maybe you remember this "good" English tradition?) - my parents believed that a "slap in time" would be better than an explanation - boys of my age, who practiced violence and thought, I'd be a good victim - prefects, who thought, punishing me would make me change (bedmaking, shoe polishing, penalty duty). So, I "learned" very quickly: Hit back - and hit harder (tit for tat + percentage, preferably a high percentage).
It took me quite some time and work after I decided on my own to stop this behaviour (at 16) to find other methods. But... how many stick to this behaviour because they think it's correct? How many ask themselves if they would like to try out another way?
Maybe you see where I come from now => the violent side, as a former aggressor and a victim.
I still say => violence (physical/mental/verbal) causes harm.
Kiya