That is risky from a legal standpoint due to various discrimination laws, but the less risky way is to relocate out to a suburban area where cars are required and transportation costs filter the possible customers to skew towards wealthier people.
Or the stores can become membership only, or just shut them down and go online.
He said it was very effective in reducing bad behavior.
Back in the 70's when I'd frequent auto salvage yards, behind the front desk was a Wall of Shame covered in bad checks. You only got to try to pass a bad check once.
I also wouldn't be surprised to see shopowners starting to share data about who the thieves are, and the thieves will find themselves denylisted.
This is why stores in the ghetto have such systems for dealing with customers. It's not because their owners and employees like dealing with people through a tiny bank teller-like hole. It's from painful experience.
(Same goes for why certain items are locked up, only retrievable by an employee, in drugstore chains' outlets in certain locations but not elsewhere.)
This neighborhood-by-neighborhood variation even happens for branches of the same bank.
https://www.kiro7.com/news/local/caught-camera-seattle-store...
and a few months back, Nordstrom had their store windows smashed out, windows that cost $50,000 each.
What we'll see is a slow evolution of street level shops into fortresses with smaller windows with bars over them. Perhaps also locked doors with a gatekeeper who decides who gets in and who doesn't.