I wouldn't say either are ruined. They just attract some fucked up people. I don't think any media should be judged based on what kind of person obsesses with it and how they express that obsession.

With those two, you can even laugh knowing the people who make/made those shows don't think highly of those fans.

I got that sense from the new Star Wars trilogy, too, especially ep 7 where Kylo is an obsessive Darth Vader fan who wore a helmet for no reason and wasn't nearly as effective as his hero was (he loses a lightsaber duel to someone who hadn't ever used a lightsaber before and his most destructive action in that movie is throwing a temper tantrum and destroying one of his own rooms).