Thanks mad_jock. A lot of acronym confusion there! I still dont really know how it works here in aus, but from what I can gather its CASA (Civil Aviation Safety Authority) is the regulator but ATSB (Australian Transport Safety Bureau) is the investigative body. ATSB feeds data back to CASA for changes to regulation. I assume CASA will prosecute based on ATSB info ,ie, if ATSB determines that legislation has been violated.
So report an indecent to ATSB, it may or may not go anywhere. For example, I read one report about a SPL on area solo that let an aircraft roll into a lamp post (
Investigation: AO-2013-128 - Collision on the ground involving a Cessna 172R, VH-IMS, at Sunshine Coast Airport, Queensland on 2 August 2013). Not going to be prosecuted, but still listed for all of us to learn from.