No. The coach didn't. The posters said that a player told his child about it, and then, his child told him. He may very well have said that. But, coach to player to player to parent conversations tend to distort the message by the time it gets to the third or fourth person. I don't think there is anything wrong with teaching a player to use their hands to shield or help push/fight for a ball. But, I also agree that deliberately pulling a jersey from behind is a bit much.