Don't get me started about trolleys - in my small supermarket, if you leave your trolley, it blocks the way out and the access to put your grocerys on the counter. But so many people put their stuff up, get their bags and leave the trolley and go out! It's enfuriating and rude! They also often leave their basket on the checkout once they've unloaded it and don't take it away either. I have frequently picked up peoples baskets (or pushed their trolleys) and gone past them to put them away (muttering I'll put this away shall I under my breath) while they are standing there watching and they don't seem to notice at all!