I live in an apartment, and I'm that guy. No ones complained yet. My Ranger has no muffler, two tips in front of the rear tire, MAC intake. It's loud, and I like it that way.
My Lightning sounds like it has a turbine engine under the hood, Borla catback, two back cats deleted. It's loud.
My two bikes are both loud, but not obnoxious when just tooling around. Only really nasty when you're beating it like a red-headed step child. LOL!
My Mustang is a work in progress. Already had a dual exhaust catback when I bought it. Just put a WeaponR intake on it. It's really the quietest vehicle I own. Not sure how long it will remain that way.
My apartments are pretty well soundproofed. I don't hear the other loud vehicles in my community when they roll by. Yours?