Yesterday this mf brought a whole shopping cart full of groceries to the self-checkout. Three of the checkouts were down so there were only 3 open. Not the spiciest, but like, damn.
You're technically supposed to use a human cashier lane if you have a lot of groceries. At least in the USA, it's pretty common for self-checkout lanes to have "15 items or fewer" signs.
Depends on the stores these days, in my experience. Some stores are scheduling fewer cashiers after installing more self checkout lanes and have removed signage about item limits in self checkout. If you want a human cashier, you have to wait a while because there might only be one on shift so you get a line.
Using the self checkout for larger shopping is ok in my book. But what sucks is using the SCO and buying an age restricted item (e.g. beer). The checkout locks down and summons an employee to verify the age and unlock the station again. If you buy age restricted items, go to the normal checkout where your greying hair is accepted as age verification!
My problem with this kind of thing comes up at places like Walmart or target where I get some random item that is age restricted that you don't necessarily think about being age restricted until the machine is yelling at you.
Kind of wish it would take the rest of your shopping cart into account. The guy buying fishing lures, dish soap, a box fan, and some groceries is probably not a teenager who's going to go home and huff that canned air duster.