I was in a tile showroom last week. In the bathroom section they had the usual tiled bathroom displays with toilets, showers, baths, etc. Howeover there were signs at each display saying "Customers are asked not to use the display toilets. You can request the key to the customer toilet from any member of staff". I was quite shocked. It must be a real problem if they have to put signs up and WHY do people need to be told this?