I completely agree with Mr. Roswell. It's not ill-defined what constitutes Angry Fandom, the key phrase is "Obsessed with the obsession" with "trample the things you love, and they'll never leave you" as a runner-up. It's like with the infatuation story, he was in love with being in love, he saw this perfectly ordinary person as the end-all-be-all of everything to do with adolescence. In the end, she was just a girl.
There's a line from the Masters of the Universe movie that encapsulates this concept as well, about how the wicked look upon what they can't have and see that as their destiny.
I've never encountered Browncoats, but I've met quite a few less-than-likeable X-Men fans, namely the ones who importuned "Where's Gambit?" for each of the three movies then weren't any less angry when he finally did show up in the Wolverine movie. I wanted to say to them, at the risk of being eaten alive, "Look, Gambit's just not that interesting a character. These movies are about people regretting their abilities and the problems that arise from having them. Gambit just doesn't fit into that category." The point is, they're overlooking the source material because they basically want to see a glorified cosplayer on the big screen.
It's fine to be a fan, but believing that just because you bought the ticket, book, toy, or adult halloween costume, you're somehow entitled to the direction that work takes is just pure delusion. Fans come after the fact; they're a reactionary phenomena, the effect and not the cause.
To quote another Escapist contributor, "Fans are clingy, complaining dipshits who will never ever be grateful for any concession you make. The sooner you shut out their shrill, tremulous voices, the happier you'll be."
Cheers, Colin