Runners should be restricted to a no entry into either 50m arc, if they need to talk to a full forward/full back then they can meet them at the 50 when its appropriate to do so...
Or only when there is a break in play. ie ; goal scored, blood rule or stretcher.
There is noooo need for these blokes anymore. They rotate so often that im sure the coach can get them a msg ffs.
And if they don't know that there is 39 sec left when they look up at the screen and it reads 30+ min then why are they playing footy in the first place???