Loud car and motorcycle exhausts have become a bit of a public nuisance, and I'm quite tired of it. People with customised loud exhausts who insist on showing off their ill-manners, by making a terrible amount of noise, should realize it's waking people up, especially in Amwaj.
It's quite annoying but more importantly, it shows a real lack of social etiquette and courtesy.
In most countries that I've lived in, it is illegal to have such noisy exhausts, and most importantly it is enforced ruthlessly. I think loud exhaust cars and motorcycles need to be confiscated until the exhaust is replaced for a quieter one.