Movies & TV Shows by decade instead of genre

If you have visited the Movie and/or TV discussion sections, you notice the forums are arranged by decade. Most websites would arrange by genre, but this could cause some tension between posters due to many many movies being of more than one genre. For example, someone could get made if you post Ghostbusters in the sci-fi section instead of the comedy section. See what I'm saying? Things will be less complicated this way.