Lowes and Home Depot, two retailers of tools and home repair supplies, got Flock cameras for all their parking lots after a wave of organized thefts in multiple states. By tracking license plates, they were able to end several rings of thieves who had been stealing millions of dollars worth of goods.
But this sounds like a policing problem not a private enterprise problem. By all means let them have an ALPR reader at the parking lot egress. 'Hi 911 yes we saw this pickup truck XX1ABC steal our shit at 2359hrs this evening', not 'cool we'll play cops & robbers with highly sensitive PII and no accountability or due process'