Trouble with that Ronnie is there wouldn't be enough to go round.
Apply the rules consistently and the job becomes simpler but they all have to do it all the time.
Before next season the authorities should tell all clubs that eg shirt pulling or man handling a player in the area will be a penalty,no discussion, no argument.The players would soon get the message after the first 3 pens against them.
I'm not a big fan of rugby( union particularly) but they have a much better way of reffing and controlling a game.