David Campbell writes a rather interesting article entitled Fandamentalism regarding the one trait all fandoms have in common - its crazies. It mainly references Transformers fandom, as his commentary on the upcoming movie is what sparked the issue, but he covers several others on a general basis.

And, yes, for the sake and beauty of irony, a flame war does break out in the comments about whether or not Transformers is the greatest. show. evaaaaaaaaaah.