"Australian government policy" doesn't mean squat if the rules say something different. Remember: Governments leave all this airspace and procedures trivia for the "experts" to run.
But in any event, just tell everyone what your rule book says, and everyone can choose to comply with your rule book. Simple.
If you want to advise all VFR pilots not to monitor area frequency and not to make broadcasts on area when operating into or out of a strip that's not on any aeronautical charts, just grow a pair and give them that advice.
