There are those who believe that "accidental shoplifting" is a myth. It's not. I just did it myself a couple of days ago. Sam's Club uses a hand held scanner at the self check-out registers so all you do is point it at the stuff in your cart and pay the bill. I always count my items against the quantity on the receipt and they matched. I get to the door, hand my receipt to the checker, he counts 7 items in the cart and 6 on the receipt. I recount and come up with 6. Then he points under a big bag of oranges that had hidden a small package of cheese from my view. Oops. I retrieved my receipt, went back to the self check-out, paid for the cheese and all was good. Whew.
And that wasn't the first time that happened to me. A couple of years ago it happened with a greeting card and I didn't notice it until I was loading my trunk. I went right back in to the self check-out and paid for it.
I can understand store security people not believing in "accidental shoplifting" and, under other circumstances, I could easily have been in the same soup that other posters have been in.
Just saying that I've become a little more tolerant about the "accidental shoplifting" stories and maybe, just maybe, store security should also be a little more tolerant depending on the circumstances and allow people to go pay for the item and leave without issue.