The fans themselves are a different story. The simple explanation for that is that they are human. They'll either act like starfishs, weirdos, "normal" fine people, or a maniacal treat-it-like-a-religion "converting" machine.
They're not all bad, as not all humans are all bad. The fanbase gets a lot of flack because the focus is always on the people, comments, artwork, and so on that is in someway usable to feed the idea that there is something wrong going on.