Given the shoplifting levels, comprehensive lack of enforcement, etc they don't practically have a choice. See also SF whining a couple years ago because a Target actually reported all the thefts and it made Breed look incompetent. And the open retail-theft marketplace operated at 16th st bart.

Anything to maintain your belief that crime isn't real.

I would not expect an hourly employee barely making minimum wage with no benefits to even lift a finger to stop a potentially violent shoplifter. If it were me, I'd hold the door for them to get them out of there.