When I was in the supermarket the other day, stock clerks were "stocking" the canned vegetable section by just opening cases and putting them on the shelf with no regard of the items' usual shelf locations.

"Just throw 'em anywhere on this big old empty shelf and they'll be gone in under a minute anyway. Even if it's something we don't usually sell a case of a week. Why waste time walking down the aisle to put them where they belong?"