Don’t ever make fun of someone who’s deeply invested in something fictional.  Whether it’s a cartoon, a comic, a video game, a book series, or anything else like that.  You don’t know what that thing means to them.  Maybe it’s prevented them from hurting themselves, or helped them get through an illness or a bad situation.  Maybe they met their only true friends through the fandom.  Perhaps they simply just enjoy the thing because it’s well-written and entertaining, and they’ve spent years watching the characters grow.

Let people have emotions over something they enjoy, okay?