Do you think there is such a thing called store/shopping etiquette? I can shop/window shop with my sister comfortably, but it drives me nuts when I go shopping with my friend. She is all about, "oh this is expensive", "this a mortgage payment", "this is for rich poeple", etc. She is a dear friend, and I avoid shopping with her, but sometimes it happens that we are close to a shop where I like to browse. And the comments gets on my nerves, and the snooty SA get even snootier when they hear her. I may not be able to afford everything in the store, but at least I know how to carry myself. What would you do or say?