I think they are a little louder than a 4 stroke because of the piston port timing.
But, the typical 2 stroke has mimimal mufflering to begin with, since they usually are on something small.
On a bike, you can attenuate the noise better than on a weedwacker or scooter.
My personal preference is a 4 stroke. No mixing fuel, engine life much longer too.
We don't have kids on scooters to deal with here because anything with a motor is considered a motor vehicle. The police take care of that problem.
We have the morons on Harleys with straight pipes- wanna trade?
Pretty quiet right now except for a snowblower on occasion.