Old News - Noise detecting cameras are in some parts of Europe, Taiwan, the UK, and US to detect loud cars and minimise noise pollution.
Currently, noisy exhausts are largely unchecked in Sydney and reasonably common depending on area. On occasion, I have heard that there are vehicle inspection stations. There is also the option to report to the EPA in your state. eg: NSW.
Would you support the introduction of Noise detection cameras in Australia?
Personally more concerned with people with diesel 4x4 that emits heaps of black smoke in the city. I found car noise less of an issue, unless Hector is going to be running three Honda civics with spoon engines and straight piped exhaust.