If the NFL plays the black national anthem in an empty stadium, does it make a sound?
The first game of the season will have huge numbers of empty seats, greatly embarrassing the NFL.
But after that, the home team owners will send sound trucks through the nearby inner city neighborhoods, giving out as many free tickets as they need in order to fill the empty seats, so they can claim, "See? See! We're popular once again!"
Of course, this will create other new problems they'll have to contend with. Even though the camera operators will be forbidden to show violence in the stands between rival gangs, it'll be pretty tough for the announcers to ignore the sounds of gunshots, which will reverberate around and around the stadium.