As VFR I assumed CASA wanted us to stop all stations call.
Not CASA, Dick Smith and his mates at NASIG. They even got it put into AIP for a time - what a disgrace. Fortunately, CASA finally saw sense an AIP now encourages pilots to speak up.
For those of you who think "looking out the window" will save you from a midair with a turboprop or jet, think again. I don't particularly mind if you kill yourself through bad airmanship; the fact is though that you will probably take many innocent lives with you in the other aeroplane you run into.
If in doubt, speak up (and that includes if you're in E airspace anywhere near a D tower)!