It really depends on where you are at. Here in southern Nevada we are losing ground to development and dust restictions. Nobody is hiking or camping in my riding areas but we do come across horse riders from time to time. As for loud pipes, (I'm running a stock YZF can) I am for them in racing; it lets me know when someone is coming up from behind and lets the guy infront of me know I am behind him. Things can get pretty hairy when you sneak up on someone at high speed. As for general riding and pratice I hate them, hard on the ears and makes them ring for hours after the ride. I do not ride in populated areas but if I had to comply to a noise limit I would to avoid the hassel, I don't like to pay for car registration and insurance but it does make it a lot easier to drive on the streets. On the other hand there will always be those that move next to an airport and complain about the noise and our bikes will never be quiet enough to make everybody happy.