Since they changed the rules a short while ago (I believe it was called the Ritchie or Manly amendment) does the rule not state NO contact with the head...... immediate ban etc etc. Since that change it is noticeable the refs are really reluctant to ping most people for head hits because the repercussions are far greater and we would see a stack of players every week being suspended. So if anything this rule is a detriment to the game not an improvement, well from a player welfare point of view anyway.