Actually, there are no rules in the NFL that say anything about what the players are supposed to be doing during the national anthem. Matter of fact, they didn't start having the players on the field for the anthem until 2009, and it was marketing to make them look more "patriotic".
There's the answer! Just go back to the old routine of keeping the players in the locker room until after the anthem.
That's it exactly. If the Pentagon hadn't been pimping for fake-patriotism in recent years, none of this would have existed to react to.
Funny how nobody wants to acknowledge who it was that originally injected politics into sports, yet all these wags want to jump on those who stood up to it in reaction.
If that ain't thought control I don't know what is.