Loud pipes are not a safety device.
Let's do this a couple more times . . .
Not a "dedicated" safety device. Loud pipes may make your presence more apparent, but to rely upon loud pipes for some sort of putative safety margin is specious at best.
Let me concede here too that on more than several occasions I've turned my head to check clearance while passing or changing lanes. I get the deep, fat, rich reverberation of my engine in my ears, and I say to myself, "That's the sound I paid for!"
-- but it's not "safety equipment."