The United Fiasco clearly shows to me that people need to be trained to de-escalate.

[Denzil_DC]

7. I've known a few pub and club bouncers in my time.

The best took pride in the fact they seldom had to get physical with customers, usually ones that were too drunk for their own good. One guy ran a pub in a roughish area of Glasgow. He was stocky, but not someone you'd immediately back in a wrestling match or fistfight. He said the art was to persuade someone who needed to leave that it was their idea to go.

If they could see the value in applying a little psychology and street smarts, I don't understand why this isn't a key part of the training of anyone who plays the role of enforcer.