As is the checkout person will essentially never deny someone based on a mismatch because it causes quite a logistic issue to deny someone who has a big cart of goods, most of which are sitting on the belt, then to suddenly refuse their service.
it's just a barcode reader. Nothing more.
And nope on your 2nd point - I've seen cashiers deny a purchase due to some membership problem, the cashier puts everything back in the cart
"it's just a barcode reader. Nothing more."
This is hugely presumptive and profoundly technically ignorant (are you actually in this industry?). When someone scans in the image can be displayed anywhere else. As infecto mentioned, a tablet for instance. Again, it's a risk for people using someone else's membership. Otherwise it's completely useless because we know they scan at checkout.
"And nope on your 2nd point"
Pointing out an exception is pretty ridiculous logic. I've never, in my life, seen someone's card denied at checkout. Ever. I guarantee I have been near hundreds of people using other people's cards. That it happened somewhere at sometime is pretty lazy contrarian nonsense. Further, I would wager that what you saw was actually someone who thought they could use a visa or didn't realize their membership expired -- where the cashier is left with zero options -- and not someone using someone else's membership.
It was a busy saturday. 10th Street San Francisco
Someone (mananger?) came over and checked the card and then the manager and the cashier recarted everything on the conveyor. The manager took the cart.
You can only order food at the self-pay kiosk that doesn’t check your barcode and there is generally no enforcement of memberships at the food court as no one has ever asked for my card.
Restricting the food court would generally require checking id cards at the exit and/or demanding a membership card at the self-pay kiosk or upon pickup of food. Nothing described in the article actually does this, so I’m not sure this is what’s being described.
Apparently there are some Costco’s on the West Coast or Southwest where the food courts are outside and don’t require a membership check, so my analysis might not apply to the different setups.
Interestingly they had the same items except they had jalapenos instead of relish