You can always beat them with a hickory broom handle.
Likely no broken bones, but it hurts for nearly a month.
A real attention getter.
Just regularly confront them near your business and always carry that broom. A GOOD broom with a 1in pole/handle.
Wait for the inevitable.
They won’t come back.
This isn’t 1962. You will be caught on surveillance camera and charged with felony assault and battery.
Hickory is the hardest wood