There's big demand for loud cars. You really only need a couple assholes per 100,000 population to buy them and hoon around late at night for it to be a public nuisance. This isn't going away until the government bans gas cars completely or cracks down hard on existing noise regulations.

There is a new iteration of an old car (was it the Camaro?) and the engineers had to hack the motor to make it louder because customers were complaining the car was not as loud as it used to be.