I was at the self checkout in Sainsbury's local earlier. I scanned and paid for my shop, and I started packing it into a carrier bag.
I heard a noise next to me, turned around and a woman had put her shopping in my ( now empty) basket and started scanning her shopping before I'd even had chance to finish packing. She glanced at me but didn't say anything to me and didn't seem annoyed or hostile.
The self checkout consists of a shelf for a basket the scanning screen and a surface for scanned shopping. It's not a multi user unit.
The shop wasn't busy, the other self check out was available, and both were card only. There also wasn't a big queue for the manned tills. There was 2 members of staff and 2-3 people.
I didn't say anything to the woman because I was just so baffled that she was there. Surely etiquette is to wait for the first person to have taken their basket and left before you start loading up your items and scanning, and the alternate option is to use the other available self checkout?!
I'm not annoyed or anything, I just found it odd!
YABU - The woman was following the proper etiquette of supermarket self checkouts
YANBU - The woman's behaviour was odd and she should have used the other self checkout