Lookleft - settle down, son.
I'm not having a go at you or RPT pilots in general, or even at Jetstar in particular - one of my best mates is a J* captain. Just pointing out in what I thought was a semi-humourous and ironic way the other side of the RPT/jet vs GA coin at non-towered airports such as Ballina.
WRT the radio call issue: there have been senior Jetstar ops people come along to present at a few CASA/Airservices aviation seminars that I have been to in several locations. On at least two occasions that I recall the issue of IFR radio calls that were unintelligible to the uninitiated was raised (not by me, BTW) and the Jetstar ops rep response was that "that makes sense, that should be easy to fix". My J* mate has raised the issue as well. Obviously for reasons you state, it's not easy to change the culture, even for minor issues like this..