I think that anyone who goes to an extreme level in any kind of fandom is going to be considered strange and/or stupid at some level. People who are so into sports that they live and breathe it, that's all they talk about, go dressed in face paint/body paint, etc, etc are considered a weird - the sad thing is though, that comparatively, since something like sports is more main-stream and understandable, they aren't considered as crazy as say that woman with the tmnt fetish :)