biggest threats are insider threats

back when bookstores were a thing most places I used to work in one, and had a manager watch us, the entire time, as we took romance novels we couldn't sell out back and ripped off the covers before tossing them in a ship-back bin. Ditto for a few others like best sellers and some mags

she took two us out back to do it, leaving only one person on the floor to run the checkout -- field day for any serious thief. but they were more worried about us...