The biggest offenders here in the PNW are actually pickup trucks. Having worked in the automotive industry recently, I know that pickup trucks are one of the only profitable classes of vehicles left for dealerships. It's really an unfortunate situation. People are willing to overpay for gargantuan vehicles that make too much noise, use too much fuel, and pose a severe risk to pedestrians, so they can build some kind of macho identity. This really seems like an area where governments should step in and put upper limits on vehicle size and noise generation.