YOU are implying that a person became a school shooter because they were abused. You can kindly fuck right the hell off.

forced isolation isn't an effective punishment and while definitions of abuse vary you are saying yourself that it requires additional conversation.

I'll ask you these questions as well: What purpose does forced isolation serve?

What's an appropriate response to a child who will not go to or stay in the corner voluntarily?

nobody out here giving time outs isn't also talking to their child about what they did wrong.

You are fortunate to only know great parents, i suppose