I can guarantee any customer in my store that I ringing them out will be 5 times faster than them doing it themselves at the self checkout kiosk. Working in a supermarket with them can be maddening enough, I'm sure, but I work in a hardware store and we have so many odd bits and ends that it comes to a point where you're basically bouncing between kiosks helping customers who can't figure out why they can't scan the handful of screws they just grabbed from the bucket. If I could, I'd rip every one of them out and replace them with four more cashier's stations. We like to joke among ourselves that their only use to us is as job security. Or the carts, the floors, the aisles, or shelves! Pick up after yourselves! Retail employees are not your maids!