I guess I'm kind of equating it to "common courtesy" from a retailer to their customer.
But I know the definition of common courtesy can vary drastically.
The first time I travelled to the North I was surprised by some of the little cultural differences. People not holding the door for me or saying "thank you" when I held it open for them kind of bothered me at first. It took me a bit to realize that they weren't being rude; that just wasn't a part of the "Northern" culture like it is in the "South".
I know I'm using sweeping generalities saying "North" vs "South"; I'm not trying to upset anyone, please no flame wars
Mac