I started using grocery self-checkouts during COVID, but I’ve kept using them because there’s rarely a line (and I’m a misanthrope). I’d probably go back to using regular human checkouts if I had to dig through all my crap to prove what I bought.
Having said that, I’ve noticed myself making mistakes. I’ve accidentally failed to scan an item, and I’ve accidentally entered incorrect codes for produce. When I notice, I fix them, but I’ve probably missed a few.
I guess the easiest answer is for grocery chains to reinvest some of those windfall profits and hire more cashiers.
You don’t legally have to stop and show your receipt (except Costco). I have a friend that pont blank tells them “nah” every time. Catch is, security can legally detain you if they really suspect something.
For me it’s not worth the hassle and I just show them with an annoying look.
Eh. The security minion is doing their job. If I get roped into a search I’m not gonna take it out on them.