Actually, they are. I had D&D's slipons...they were horrible. When I was doing track days regularly, I used a D&D Full Race set (headers, pipes)...those were ungodly.
Since going to the Yosh's... They are very quiet by comparison. Barely louder than stock. (I repack them every 8000 miles). I'm also a considerate rider. I don't run high RPM or large throttle openings around ANY neighborhood, (ANYWHERE near houses). Even on the freeway I keep my RPM down. Why? Because I know just how annoying it can be to here the sound of loud exhaust 24/7, and the SH has enough torque to accelerate in any gear.

I'm 100% all for this because I live IN a Canyon. Any day of the week, just about any time of day, I can hear loud motorcycle/car exhaust. It's a common occurance. Because the Cayon opens up to a populated area, the sound reflects up the canyon(in addition to the twisties IN the canyon), and I can hear bikes/cars sometimes 3+ miles away, on the main streets as they accelerate from stoplight to stoplight. Several of my neighbors ride, since moving to this house/location 3 years ago, I've taken several of them to task on their loud exhaust/riding habits. I have YET to have a single one not listen. There is a 20/21 year old who lives down the street from me, he also rides a superhawk (my wife calls him my stalker, since he followed me home after seeing another SH in the neighborhood). Turns out, he was the person who bought my D&D Race system off ebay a few years ago. When I confronted him on the noise and the hostile attidude it causes, he was initally "meh, whatever, if it's too loud, you're too old". I talked him into letting me ride the bike around the neighborhood so he could hear how loud it was, and how far away the bike could be, and still be "loud".. He was amazed that I was 2.5 miles away, but he could still clearly hear the bike, and that it was still "loud". He changed the pipes within a week. (I think it helps that his dad was there telling him the exact same thing).

There's no reason for overly loud exhaust unless you've got a racebike that never see's the street. If you have them, there's absolutely no reason why you can't take steps to minimize the noise produced by your bike when there are others around that might be offended/bothered by the noise. If you're not doing that, you're just another "damn loud motorcyclist" to the general public, and that my friends is NOT a good thing, for ANY of us.

Getting back on topic, of the "noise cameras" the simple solution is to use a higher gear (lower rpm) or "coast" past the noise station. Unless they put em in different locations every day, folks will soon figure out where they are and take a different route or use the above methods of not being cited.