Regardless of what some people believe (read: Bill), there are no rules for being a sports fan. You can be a fan of whatever team you want, whenever you want. The team you root for is a completely subjective concept, and there isn’t some committee (read: Bill) that sets guidelines and allows you a window to make a switch. That is some bullshit. Who is someone else to tell me what team they “are fine with” me being a fan of? When I turn on the television and see two teams trying to win a game, I don’t send an e-mail to a distribution list asking if it is OK for me to want one team to win more than the other, it just happens in my heart. If you’re a Knicks fan and you want to root for the Nets, go right ahead. Who cares? That is what I will be doing. I know this opinion is unpopular, but you know what isn’t unpopular? Fucking freedom. So while all of you are asking each other permission to root for one team or another, I will be draped in the American flag drinking a Budweiser with a bald eagle perched on my arm switching sports-team allegiances. If you have a problem with that, then you should really reevaluate what is important to you.
— David Jacoby on fandom.