tukapa1:
Interestingly if a player makes a mark on the ground after being awarded a penalty that means a penalty shot must be taken. This doesn't get enforced either. You regularly see a player walk up, grab the ball, make a mark in the ground, take two steps back then run about 5 metres past the mark to kick to touch. They should be forced to have a shot at goal once they make the mark in the ground if refs were enforcing the laws.
Sorry, but have never heard of this rule in all of my years involved with rugby. Have just checked the rule book (Law 20 - Penalty and Free kick) as well and cant find anything that says this.