Another game store who works the "entertainment model," buying and selling used media like video games, has had problems with customers. His problems are unique in that his business model deals more with the general public. In his case, he has issues dealing with minorities. Game stores generally don't have this problem due to the general paleness of the game store demographic. There are few minorities who game.
I bring this up because the issues and irritations he faces are similar to what I face during the holidays. This is the period where our geeky, interesting customers are not allowed to shop. Instead they send their muggle friends and relatives, much to their dismay.
My theory is that muggles, the regular people, or bala pritag jana in Pali (I love that they have a word for muggles in Pali), are just rude. They are rude all the time to store employees and get away with it. First, they shop primarily in stores with poor service, so rudeness is their default attitude. They put on their stony faces when they shop and expect to be left alone. Second, nobody who ever helps them, if help is what you can call it, have any authority or ability to call them on their rudeness. Minimum wage employees don't care and would get in trouble if they called them on their crap.