A loud noise/exhaust causes
A loud noise/exhaust causes pain, and hearing damage. It is a PHYSICAL ASSAULT. Loud car (and esp motorcycle) people should be arrested for PHYSICAL ASSAULT.
Yes a person should have the right to do whatever they want, but a lot of those activities dictate they can't be done near other people, in neighborhoods, etc (shooting, racing, rock concerts, landing an airplane etc) - they dictate using locations far from non-participating people.