I recently bought an '18 6.6 Duramax diesel Chevy and it does run very clean compared to older trucks. I wouldn't say that I'm in favor of all of the HP robbing emissions BS these days, but I also do not condone rolling coal on people just to be an a-hole or just for attention. I've been told at least 100 times in the 2 months since I bought this truck that I should delete it, tune it etc. But I really have no desire or need to. It has plenty of HP and torque for my purposes and I'm not about to void warranties and basically make it illegal.
Rolling coal on people is just plain ignorant and disrespectful, and deserving of an *** kicking. Loud exhaust systems are a different story. I doubt that most people do it just to annoy others. If you are a gearhead, performance driven person odds are exhaust mods are more about HP and the sound that comes with it. There is no better sound than a well tuned, strong, high HP engine pumping out power and speed. Of course, that sound is completely different for different engines and owners. I hate the sound of "fart cans" on little tuner cars, and also extremely loud Harley type cruiser bikes. Especially when just revving either one just to make noise and draw attention. But I love the sound of a sportbike screaming high rpms (please do not call them rice rockets or crotch rockets, lol) or any muscle car type sports car or truck that just roars with horsepower. Someone made a comment about a screaming Banshee......I have a Yamaha Banshee with way too many mods to list including exhaust mods. That screaming Banshee sound, literally, is just amazing to me but I'm sure it pisses off my neighbors, lol. My Yamaha R1 (1000cc sportbike) with mods including exhaust sounds like a racebike, which it essentially is. And again, winding up to 13,000 rpm's is just plain awesome to me but I'm sure it annoys some people. Nothing beats using all of your available HP sometimes and the exhaust from it is just a bonus. Everyone has their own opinion of what actually sounds good though. If you are one that is annoyed by it, deal with it the same way I have to deal with your quiet little no HP ride not being able to get out of my way, LOL.