Thats how my inlaws are. He has never kept a standard exhaust on any of his bikes for the simple reason that if they cannot hear you, they won't be looking out for you. He's only come off his bike twice. First time was a drunk driver running a red at a stupid speed and hit him, put his torso through the window and legs bent backwards on the roof. Then when he slammed the brakes on it flung him forward and he landed face first and dragged him for a bit. Has scars along his chin and lips from where they pretty much stitched his face back together. Makes me feel ill when he tells the story of getting a wire brush down his back to get the gravel out.
Anyways RIP to the rider, sad that someone even younger than me won't be waking up this morning with his family like I just did.