You can literally call the police up anonymously, tell them someone had been hooning (even if your making it up) and get their plate numbers and type of car and it will be confiscated from owner for 30 days with demerit points and fine.
By the time the owner fights it in caught the 30 days will be up, he will have court fees, impound fees and won't be refunded for the fine.
Cops are even allowed to inspect your car for defects or illegal modifications. And given most cops know little to nothing about cars they generally make **** up if they are having a bad day or they don't like your attitude forcing your car off the road and forcing you to pay for road worthy inspection.
So much revenue gets made on Australian roads. Should have seen the Easter Holidays. They reduced speed limits everywhere and had speed traps around every corner along with a massive amount of extra police patrolling the roads.
If someone reported a damaged car cops would be all over it.