Won't Miss #483 - being treated like I'm stupid

I'd like to think the person who made this sign wasn't stupid, merely that he or she was careless.

There have been plenty of experiences in the U.S. since returning in which I have felt like I didn't know what was going on. Things like using a debit card at the supermarket were new experiences to me. The things which Americans have gotten used to over the years which did not happen in Japan