The best way to test a new surrender technique is one city at a time, so you can see if it makes a difference. Perhaps other cities could try modified approaches to see what works best. In each case you would do a general publicity push to teach people how to surrender, much the way our laws about seat belts were publicized with the successful “Click it or ticket” campaign.
My best guess is that my surrender technique – or something like it – would nearly eliminate the risk of violence for anyone who used it. The hard part is persuading people to use this method. That’s where simplicity, A-B testing for best methods, and a good PR campaign come in.