I read this several times trying to figure out what you are talking about. I think I got it.
You are saying that loud pipes will save you from the daydreaming driver on a 4 lane, who's about to move into the left lane, just as you get several feet behind him traveling at a faster speed than he, so he doesn't lane change in front of you.
Okay.... How many lives have been saved in this scenario?? So if the motorcyclist had been on a bike with stock exhaust he would have been injured or killed??
Do you consider this your first line of defense against day dreaming drivers?
So to make this more effective do you ride in whatever gear that makes the most noise?? So cruising on a 4 lane at 70 mph do you run in 3rd gear or something like that to make more noise to improve your chances of self preservation?
Or, if you have a riding buddy along do you ride side by side to increase the noise level so you would be detected at a further distance by the day dreaming driver?
I'm truly not trying to be a smart***. I'm trying real hard to understand this logic.
I have been on a bike for the better part of 42 years. A biker on the highway is at the mercy of his /her own ability and experience. Every and I mean every,added advantage or possible advantage that a rider can get in order to be seen or heard is a welcome benefit. So yes, I believe a bike approaching and passing a vehicle is far better off with louder pipes than a bike with a mellow exhaust stealthily passing a 4,000 lb Buick. If someone can not hear a Harley 20 feet behind them on the road, they should get their hearing checked.