We really need a code of etiquette for them, though. Trip to the store this morning, and they were down to 3 self-check stations from usual 10 with literally a dozen people in line. Including one couple with a cart full of a week's groceries and one lady trying to win coupon roulette. Four other people cycled through the third scanner while those two piddled away the day.

Here in Denmark, it's becoming more and more common to be able to scan your items with your own phone using the store's app while you go through the store, and you can bag everything straight from the shelves.

You then pay by credit card, also with your phone, scan a QR at a designated exit, and you're good to go.

They have random checks, but they've only been about 1/20 for me.

None of our stores here bag your stuff anymore so it doesn't matter what line you pick.