Poll: Has a fandom ever ruined things for you?

So we all have these things we love. Sometimes they become obsession-level parts of our lives. For some, it's Marvel or DC. Others it's Taylor Swift or Nikki Minaj. For me... it's Mass Effect, anything related to Alice in Wonderland, and my unfortunate reason for this poll, K-pop. 

Have the fans of something you absolutely adore ever ruined that thing for you? Because fans of certain groups I follow have fucked up how I feel about them. The toxic reputation that they have earned the fandoms, the way they feel they have a right to control everything, the racism, the bullying...and the belief that they are the experts on everything in K-pop....fuck them. I don't want to be associated with that shit. Does anyone else know what I'm talking about? Can you relate or am I just crazy? 

Feel free to answer the poll and discuss it in the comments.