That's not what I meant. You seemed to imply that the other things mentioned won't become illegal because they don't "disturb the public." I just listed a bunch of mods that shouldn't disturb anyone but are still illegal in California.
And for the record, I like loud bikes in the right setting. Hearing them roar up Skyline leaving Alice's is pretty neat. Hearing them sit at stop lights and constantly pumping the throttle is obnoxious. It's not as easy as "all loud pipes are bad." My bike's louder than stock, but I don't know that it'd catch the attention of this crackdown.