Oh please, there are just as many "bandwgon" fans in Buffalo, New York, Oakland, Kansas City and everywhere esle as Miami. If a guy who lives in Miami, roots for Miami but can't get to the game (work, family, money, doesn't feel like it) does that make him any less of a fan.
All fans are genereally the same. They want their tema to win and win all the time. Just because they choose to root for their team(s) in their own way, doesn't make them any less of a fan. A guy wearing a Dolphins hat isn't any less of a fan than a guy dressed in head toe team colors with a D# sign and a huge fin on his head while also, somehow holding a 60 oz. beer and a buffalo in a noose. They both want the same thing, A dolphins win.