Perhaps it's not so much a question of the legalities of what they are doing but the safety (and even the perception of safety) of it that needs to be considered?
I have watched and listened to them operating in the Yarra Valley for years
And yes, most times they are pretty good at making their landing where they want it. But, just occasionally, they aren't so good.
The strip of land they are mcoming down on is a narrow one. The Bay is prone to strong wind gusts. There is water on one side and dense housing on the other. The bit of sky they fall through is associated with the busiest light aircraft lane in the country.
So when does common sense override adrenalin and the almighty $? Who pays if one of us ploughs into one of them on the way down?
Kaz