Oof. The NFL has to step in already and excessively fine anyone who does not stand for the anthem on the field. They need to make it known that if you are planning to screw up every other player's livelihood, you should stay in the locker room til after the anthem. They can take a TV timeout between the anthem and kick off (wait a minute, I think they already do) to get the guys in the locker room on to the field.