Anyone who really believes "Loud Pipes Save Lives" should immediately sell their motorcycle and get a job as a church organist before they get killed. If your survival strategy is counting on a cage to hear you coming, might as well pucker up and kiss it goodbye. Loud pipes piss people off, waste your hearing (...huh...WHAADJA SAY?) and that's about it.
Unless you mean they save somebody else's life, and if that's the case, uh, I'd like that explained to me.