The more and more I see threads like this (and just this topic in general) come up, the more I think "Like who you like and don't give a **** what other people think". I mean I'm definitely one to make a bandwagoner joke when the opportunity presents itself, but it's all in good fun. People shouldn't worry if they'll be looked at as a bandwagoner/front runner/whatever if they decide they want to like a team.
This article
here brings up many great points on this kind of subject.
I tend to side with what Jacoby says in that article, although I'm personally more loyal/attached to the teams I root for.