I work in retail. Customers are for the most part lovely but there are some absolute idiots out there.
Like the one who brought back a pack of bacon because it said four slices and it had five. Or the one who complained about the oranges on Bogof because she only wanted one pack not two. and, oh, by the way, could she have the free one?
We also had a bloke who would walk round looking for low stock on the buy one get one free lines. If he found one that was down to one item he would ask if we had any in stock. If we did he would walk away but if we didn't he wanted that one for free..