system
Given the following post, respond as if you're commenting on Reddit:
human
I believe purposefully loud vehicle exhaust should be made illegal for street legal cars and trucks. CMV

I live in the eastern US and am sick of people who drive around loud pickup trucks with Flowmasters or little dodge neons and honda civics with muffler tips that go tear assing through neighborhoods causing noise pollution. Much of the time, their "upgraded" exhaust system makes their vehicle run worse than it did before. I'm all for people modding their cars to their hearts desire until it has an effect on my ability to sleep, listen to the music in my own car, or carry on a conversation with someone without having to shout over the person who has pulled up beside us. If you want a loud racecar/truck, save it for the track, or the farm. I won't even get started on loud bass cabinets in cars.

Sorry if this was too much of a rant.

Note: I didn't include motorcycles, because of the argument for safety: "It makes their presence known on the road."
gpt
I would like to see a study showing that loud exhausts increase awareness of motorcycles on the road. 

In the situations where a car is most likely to hit a rider (rider behind a car at speed, or a yielding left turn at an intersection), the exhaust isn't even audible in most cases until it's far too late. And that's assuming that it would be audible over the stereo/cell phone/wind noise/passenger talking/whatever in the first place.

Motorcycles shouldn't be exempt from noise pollution laws.