I would like to test a theory on this forum. I was contemplating upgrading the stock horn to something louder, and then it occurred to me that the few times I've actually used the horn as some sort of warning, it was too late, ie. the driver did what he was intending to do all along, and I avoided trouble not by the honk but by evasive action. When I drive a car, the infrequent times I use the horn it's usually out of anger and not as a warning to prevent some imminent bad thing. The last thing you want to do is ride around on a bike honking in anger. So, question for this forum: do loud horns save lives???