Eh? I thought the 'deliberate trick' was if the player got on his hands and knees and headed it back, for example????
A player can indeed pass the ball to their keeper if it is not kicked (i.e. using the foot). A deliberate trick would be flicking it up to themselves, and kneeing it back. This is circumventing the laws of the game, and is not allowed. And actually in my experience, referees normally notice it.