It's incorrect and misleading to talk like that malicious use case is the only one at play here.
The moment you start kicking people out over subjective "rule-violations", you are eating into your own profits, pissing off people, and projecting your own morality onto strangers. Aunt Minny may have set down that roast because it hurts her hip to walk across the store, and she realizes she already bought a roast yesterday. But over the last 10 years she's spent $25,000 shopping there. Some guy with Crohn's disease may literally shit on your floor if he doesn't drop his perishable item and run home/to the rest room. If both of those people are regular shoppers, sure the lost perishable item eats into your bottom line, but in the long run you are making a profit off them.
Waging an unnecessary morality war can only impede your ability to run a profitable business.
Edit: why not just give employees handheld IR thermometers, and if the temperature of the product is < $MEAT_MAX or $VEGGIE_MAX degrees then allow them to restock it.
That's accurate. Ask me how many times I wish I could find the guy that carelessly tossed a cart out in the parking lot (given easily accessible corrals) which subsequently bashed into the side of my car. Or found a packet of hamburger (with accompanying drippy juices) in with the toys. Or...
The moment you start kicking people out over subjective "rule-violations", you are eating into your own profits, pissing off people, and projecting your own morality onto strangers.
Leaving aside the misuse of the word subjective, this is why we avoid the "kicking out" part altogether and use financial incentives instead. It's no different than, say, ALDI charging you a quarter to get a cart (that you get back if, and only if, you put the cart away). Put stuff back where you found it like a civilized person, and there's never a problem.
I find it really annoying when people put words into somebody's mouth.
Misplaced perishable goods are certainly a problem, but not the one they're discussing right now.
The number of people that never learned "put stuff back where you got it" from their parents is astounding.