People this is how its got in retailing as well. I work for an optical shop. People come in, buy a pair of custom-made spectacles, don't like the frame shape or color after they've been made and then want a refund, complaining the glasses aren't fit for a purpose they never mentioned to the optometrist. Or they pay for cheaper single vision lenses then want more expensive multifocal lenses and argue why they now have to pay for the difference in cost in lenses. The customer is not always right, but often a pain in the ass.
