I was visiting New York City once and had a great hamburger at an outdoor stand. I told the cook that he really made a great hamburger. His reply (in thick NY accent): "Whaddya? Some kind of wise guy? You don' like it, get oudda heah?"
Reminds me of the joke about the two Canadians visiting NYC.
They need directions, but are reluctant to ask because of the famed reputation for NY rudeness. Finally, one of them summons up his courage, goes over to a passerby and asks: "Could you tell me how to get to the Empire State Building, or should I just go f'kerry myself?"
So then what - get into an argument with somebody over how you weren't trying to be an a$$hole?