Comment by nkohari

I used to work in a suburban supermarket during high school and college, first as a cashier and then as a frontend supervisor and payroll clerk. We had a security booth where you could watch security cameras, and it was literally never manned. Tapes were changed, but they were there mostly in case someone would try to rob the place. Cashiers routinely rang their own lunch up either as 99 cents or as bananas. No one cared.

Supermarkets actually factor breakage, theft, and spoilage into their books as "shrink", which averages between 2-3% of sales. There's no detective building a case, biding their time to bring down the banana bandit.

Although, modern self-checkouts have cameras on the scanner with ML-powered item detection, and they will alert the attendant if you incorrectly scan something that's sold by weight. (I've done this before on accident, fat-fingering the wrong PLU.)