Stock is hardly loud enough to bother a little old lady snoozing along at 15 mph in the fast lane.
However with the Caddy-blasters on my old truck I was once driving down a main thoroughfare in L. A. , approaching a green light, and there stumbling along in the crosswalk, against a red light was 3 inebriated bums pushing a shopping cart and paying absolutely no attention to traffic or the fact that they were crossing against a red light. They were just laughing and stumbling along. I just coasted a little bit closer, until I was about 2 car lengths from them and leaned on the Caddy-blasters. Beer cans and other stuff went flying through the air as they suddenly came to LIFE and ran for their lives! I wouldn't have hit them, but it was fun to be their "wake-up" call.