I'd used a self-scanner because it was a big shop and I'd carefully packed all my cold stuff together, heavy things at the bottom of bags, bread on top etc.
I don't mind being selected for a check, but when it's nearly half the items I just don't think it's reasonable. Apparently it's changed from ten items to a percentage of the shop (not sure whether that's value or number of items). There was nothing wrong with my scanning, so it wasn't as if it flagged a problem and asked for more, it was 30+ from the outset.
I'd have preferred it to have just sent me to a manned checkout to unload it all onto the belt if it needed so many to be re-scanned.
It took ages, while other people were waiting for approvals and help, and although the person doing it tried to be careful there really isn't enough space to unpack and re-pack carefully when you're scanning so much. And obviously they have to take from all levels of the bags, and the shopper can't touch it in case it looks like you're concealing something. I've come home and found my cheese has been ripped open and my chocolate eclairs have been squashed flat under my potatoes.
AIBU to think that 30+ items being re-scanned at the self-checkout is impractical as a check?