Anyway... Back to the OP. If the referees can't get the interpretation of a knock on correct (which they can't), then we should basically go to modified touch football rules. Lose control of the ball into another player or the ball hits the ground unintentionally then its a scrum or handover depending on the tackle count. The referees are basically calling it that way anyway. There were several examples of that kind of ruling in the games played yesterday alone.