What about those people who watch their items being scanned through by the till girl, make no move whatsoever to pack anything, and only when the total is announced, start packing. Purse? The hunt for that starts only AFTER every item is packed.
You know what? I admire them!!! We should stand there gazing at the machine pricing our food everywhichway but that which marked up on the shelf (and we only notice we've been overcharged when we get home)... and we should make those behind us wait while we so do. After all, it's not our fault the supermarkets haven't got enough tills open. Right?
Maybe we need to learn some of "their" tricks!!