I appreciate your post.In some states and areas the government is controlling smoking in restaurants.
I think the difference between your right to pollute with your car or not comes down to the fact that you're using a shared maintained road where rules apply. It's like how you can't legally purchase an old Willy's new anymore due to pollutants, yet you can buy the Mahindra UTV version.
Like billiebob's, this is another red herring. The original issue wasn't pollution, the issue was how high I can rev my engine, rpm's (and freedom to do so). I understand there are state highway speed limits and other laws to protect people. The original discussion was not discussing those laws. As far as rpm's are concerned, if I'm driving my Jeep under the posted speed limit and running 4,500 rpms, that is not against any law I know of, nor should it be IMHO. The laws themselves can be emended or updated, but that's a matter of due course through the legislature or governing body of one's state or nation.