What if they can't afford to buy Saints stuff and still want to show up and support the team? Are you saying it would be better for them to wear neutral clothes than LSU? What if they're not Saints fans, and they're there to cheer the opponent? What about Hornets clothing? What about an LSU had that happens to be black and gold? What about wearing an AC/DC shirt to a Metallica concert? What about an AC/DC shirt to a Saints game?
See where your premise is filled with holes?