Yeah, there are people who believe a lot of weird stuff. For instance, a small but significant group believes that fictional television shows are real, even ones with non-human characters (Sesame Street puppets, or cartoons, say).

Many actors have stories about meeting people who don't understand the difference between the actor and the character the actor plays. It happens all the time.

Nonetheless, we don't usually have "fact checkers" explaining to us that Kermit the Frog doesn't exist, nor do we generally have Facebook threatening a site because they've posted one of those popular "Kermit the Frog drinking tea" memes, and the "fact checkers" have pointed out that Kermit isn't a real frog, and that even real frogs generally don't drink tea.