Couple of thoughts about this:
The people trudging down the upper deck stairs tend to block the view of the court for some of us...especially when they stand on the stairs and put their coat on, or pause to watch a possession unfold before continuing their exit. However, their absence is rarely noticed by the tv cameras.
The people leaving from the lower bowl (and students are doing this too) are clearly visible on TV AND to the teams, as are the empty sections they leave behind. Bill Self noticed it, and called a timeout so his team could enjoy watching the fans leave and bask in the humiliation of our team. Even if those fans are standing on the concourse watching, it has to be frustrating for the players. If you don't care about anything else, care about the players.