I think the dumbest, yet most hilarious, case of infighting was with MLP and making Twilight a princess, now I don't engage with the community too much and it is mostly because of the amount of drama they kick up over the slightest thing which is pretty funny to watch from a distance. We knew about the change months before hand because of info from episode synopses and it was impossible to avoid spoilers for the season 3 finale where she does become a princess. Before the episode even aired massive amount of people stopped watching the show out of fear of how much it would change, despite assurance from the creators that the status-quo would be maintained. Fast forward a few months to season 4 and absolutely nothing has changed for the most part, hell in most episodes during season 4 you could have removed Twilight's princess-hood entirely and nothing would be different from the episode.