Absolutely agree with the OP, it does my head in when you hear the Ref's constantly shouting at the players to stop doing something or to do something, the players at pro level must surely already know the rules and should therefore adhere to them off their own backs, maybe at a junior level it could be utilised a little.
There was one game where the ref shouted 'play the ball' to an attacker who was trying to milk a penalty or waste time 4 times before he actually did, surely a pro RL player will know he has to do this anyway and after refusing 3 previous times surely this is should be penalised?
Another tonight where the Ref shouted 'markers you're not square', they didn't move but he just let them stay there anyway - again if you've seen them offending penalise them, especially if they don't respond to your calls.
To me the problem is the players know they can push the officials a lot further than they used to and the ref's have almost become on field coaches to the players rather than an authoritive figure, the players are coached from an early age and regularly during the week so surely shouldn't need to be told what to do on the field on a matchday.
If they are committing an offence penalise them for it rather than just telling them they are !!