"That's because communities in Massachusetts and Arizona have threatened to ban motorcycles from riding in certain areas because of the noise"
From one of the articles KKim posted. On the Cape area they set up a road block and only stopped motorcycles to see if they had their stock exhaust. The rich a$$holes down there are getting upset by the noise and there are movements to even ban riding in those areas. I'm one that a horn is much better than a loud exhaust.
http://www.nippynormans.com/NAUTILUS.../STB-NAUT-COM/
Thats why I want to get one of these. As said we are accustomed to reacting to horns