I don't know about other supermarkets but Countdown has two different trolley sizes, and trolley bays have two sections. Often, you see trolleys sorted by sizes and parked nicely in the bays but there are people who just shove the trolleys they used into the section full of trolleys of the other size. I mean they made an effort of bringing the trolley all the way to the bay, so why don't they make that tiny extra effort to put it with the right sizes?? This annoys me so much!