I work in a supermarket. Apparently Sunday was terribly busy, I was there Monday evening and product capping had just been introduced on some items but there wasn't much loo roll even then. We have a policy of 'Please be considerate' on items that we're not actually capping but if we gently ask if a customer might take fewer of a whatever product they've gone overboard with, they just come out with a string of excuses as to why they need so much, eg multi packs of bottled water.
Someone wants 6 packs of 6x 2 litre bottles. "No, they're not all for me, two are for my family, two for my sister who doesn't drive, two for my wife's sister, we can't come every week, it's only 12 bottles each for three families, we use a bottle a day, the shelf is full and don't you refill the shelf overnight anyway...?"
I'm a cashier, not the police. It's exhausting and depressing. Definitely easier when there is a printed list at the till stating clearly what the restricted items are, but even then people either reel out the excuse of shopping for lots of other people, or you see them go out to the car, come back in and go through a different till, or self-scan, with the items I'd asked them to leave.