When I walk into a bar, I always ask the bartender for negative zero beers, just to check the place out, before placing my actual order.
I have not yet been accused of arson, but it's only a matter of time.
Learning about the concept of “negative zero” in school stuck with me. It was one of those lessons where the professor had us bang our heads against one’s complement to understand the shortcomings and introduced two’s complement like Moses coming down with the stone tablets.