re: What fanbases can you not take seriously?

Bandwagoners in every sport.

E.g., Alabama football (now), Miami Heat basketball, etc.

Fwiw, I am not talking about the people that grew up following these teams, or have been for awhile. I am talking about the people that are fickle when it comes to choosing allegiances, and always follow the "sexy" pick or the media darling.

Also, let me say that I have no problem with people that pull for these teams despite having no ties to the school/area. As long as they aren't "Bandwagoners," that's alright in my book.