Well, it is still just as stupid for saying you like a band because you like that one song by them and yet don't know anything else. It's like saying you like Linkin Park for In The End, a song abused to death in Naruto AMVs. I mean, yeah, it's cool that you like what you have gotten out of something, but doesn't fully make you a fan. I mean, are you a fan of Spider-Man just because you saw the movie and have never read the comics or seen the cartoons? Honestly, no. I can watch lets say a documentary on Hitler being an alien menace on the history channel, but that doesn't make me a historian. And in turn, watching Japanese does not make you Japanese lol.