Actually, the one of the worst customers that I ever had at the bookstore where I used to work was probably an Aspie. He was a professor in the physics department at UAB and he came in maybe twice a year, looking for all these expensive, obscure books and scholarly journals and he would be extremely nasty and hostile when we told him we'd have to special order them. His voice was loud and whiny and harsh and I was scared to death of him.
One of the worst customers at the grocery store where I worked didn't mean to be a bad customer. I felt kinda sorry for her. But she bought all this really gross food, like souse and chitterlings and stuff like that, $100 worth, and then reached down the front of her dress and rummaged around and pulled out a moist, sweaty wad of $1 and $5 Food Stamps. I have nothing against Food Stamps, having used them myself, and she was elderly and poor and probably lived in a dangerous area so it wasn't safe to keep them in her purse, but still...
I have lots of nightmare stories from retail. It's the only job I could get for the 1st 12 years of working life, besides food service.
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"Lonely is as lonely does.
Lonely is an eyesore."