I would personally also consider buying drones from Ukraine

Seems that happens already in some way: Ukraine offers drone tech and battlefield expertise to Australia (archived article link)

The ‘sabre rattling’ has been practiced by China for a long time, and not only against Australia. And China’s claims the Australian aircraft illegally entered its airspace is factually incorrect.

[Edit typo.]

Your comment is apparently not accurate. It’s noteworthy that China’s claims over islands and outcrops effect not only Australia, but practically all its neighbours like Philippines, India, Buthan, Nepal, let alone Taiwan.

I get your sentiment, but indifference isn’t a solution either, and am also not so sure whether it has no effect in the long run if more people openly criticize such actions. I don’t know whether something leads to a change, but doing nothing certainly won’t.