I would also do that if I were in position to do so - after the business model studies were complete. I suspect that it wouldn't be profitable. Oh and it would have to be done in a manner that keeps employees physically separate from the “customers”.
If you add up what Walgreens is putting up with in SF...it has to be over $100k a day throughout the city that is being shoplifted via their shops alone...lifting the rates you have to charge for regular customers to make up for the losses.