Australia's just fine with adding jet engines to cars and designing|building one million round per minute guns.

It's the mixing up of such things with the general unconsenting public that raises an eyebrow.

Hoon's can hoon - just out of earshot of people that want a quiet life and off the community car parks and roadways - there's no shortage of private land and designated drag strips | raceways.

https://aussieinvader.com/the-people/rosco-mcglashan-oam/

https://thewest.com.au/lifestyle/motoring/wa-built-1600kmh-j...

https://en.wikipedia.org/wiki/Metal_Storm