Unfortunately it is going to take the likes of a real estate egent with zero airspace knowledge to launch a drone within 3nm of a major airport and hit an RPT aircraft before anything will change. Just look at the number of times unauthorised drone operations are appearing on the ATIS at major airports around the country. There hasn't been a collision yet but there have been some near misses. CASA somehow believe that a drone under 2kg cannot do much damage, I beg to differ. A DJI Phantom colliding with a jet doing 250 knots would cause some serious damage. Just have a look at this:
https://m.youtube.com/watch?v=HtArLIXZXRI.
Sure you will always have idiots trying to see how high they can get their drone or how far they can fly purely on FPV, but I do believe that this 2kg commercial exemption is only going to make it worse by encouraging ignorant individuals and companies to push the boundaries to make money.