I am sure the rule is you can shield the ball if it’s in playing distance , sometimes when defenders run the ball out the ball
Is 10 feet in front of them. This surly should be obstruction?? Drives me mad !
Law 1 covers this..A player who makes unauthorised marks on the field of play must be cautioned for unsporting behaviour. If the referee notices this being done during the match, the player is cautioned when the ball next goes out of play.