It is common law, in these parts, that if you are someone who lives in Pittsburgh, and especially if you are someone who grew up in Pittsburgh, you are a Steelers fan. Well, I'm not. And no it isn't because I like another team, it is because I don't like football.
Sure I grew up with kids making fun of me & throwing rocks at me when i didn't where Black & Gold the day after a win, but they would have done that anyway.
And before you ask: No.