I'm from Atlanta, but I admit we have the world's worst fans. I once went to a World Series game there, and by the seventh inning 80% of the fans had gone home to beat the traffic. It was pathetic. And if you ever find yourself in Turner Field, don't even think about swearing—you'll get kicked out. Trust me, I know.
I'm in New York now, and swearing isn't a problem here, but I will say that if you ever get a chance to go to the new Yankee Stadium, make sure you bring some pocket change for food and drink. Like, seven- or eight-thousand dollars would do.