I've been living in Las Vegas for over a decade now. It has been my experience frankly that BYU fans don't usually wear their colors so boldly (to you super sensitive people I'm referring to the royal blue shirt here), and they also don't typically look like they could jump onto a D1 team today.
More often the people I see wearing BYU gear look like they could jump onto 1.5 seats in the stands and eat a cougartail or two, as they recover their breath from walking up or down the stairs to their seats.
This guy looked ready to go, and I loved it! This is anecdotal of course, but it is not a lone story, I've seen it more and more in the last few years. Not an isolated incident.