That annoys me too and I don't have ADD. I don't shop in Walmart because they don't put accustic tiles in the ceiling of their big box store and I can't hear myself think.
I do tell the store why I won't be back to give them a chance to correct the problem. It helps if you know about how much you spend there each year/ month, most places don't want to lose the buisness and don't know they are sending customers away. If the problem isn't corrected be sure to write the corp. address on you reciept and let them know.