If you were to see them use their hands and call it they would not get possession. It would be a turn over and the other other team would have the ball. If this happens enough one of two things would happen, 1) the player would stop using his hands or 2) the coach would stop sending that player out for faceoff. Either way problem solved. I have heard refs tell faceoff middies if they are seen using their hands a second time they would receive a unsportsmanlike conduct penalty, further hurting their team. Im not even sure if thats allowed but it seemed to work. Can you say with the games you have officiated in you have not seen tradition grip faceoff kids use hands? As previously said If its seen it should be called and it will stop. We can not think because a player uses a moto grip he is going to cheat, just like we cant say attackmen are going to thumb the ball unless we see it