Stupid obsessive people (mostly teenage girls) who are "in love with fictional characters and wouldn't know a good book if it punched them in the face.
Twihard: "OMG!! Isn't Edward Cullen like so hot??? I'm gonna marry him!!!"
Awesome person who isn't insane: "Dude, he's not real."
Twihard: "How could you say that?! I'm in love with him!!"