What ever happened to the Badgery's creek proposal?
I know that they protested heavily about noise, but seriously your going to get the same protests, or even heavier ones from residents that live around Kingsfordsmith if you were to expand it, as well as green groups arguing about the effects it'll have on Botany.
Personally i think the Badgery's creek residents can't be selfish airports are vital to all Global cities such as Sydney.
Also following the retirement of the 707's by the RAAF what about Richmond?