The best recourse is to hit the teams with these players in the pocketbook.
Jerry Jones said recently anyone on the Cowboys that does not stand for the anthem will be unemployed from then on.
He's honest about it, at least.
James Harrison essentially said the same thing. Just without the power to do so.
Just don't put the camera on them and don't interview them afterward about it. Obviously, that won't happen. Personally, I don't give a shit if they do it. I just don't want it interjected into my entertainment.