Not trying to be a smart ass, but some accidents cannot be avoided. IE drunk drivers, dumb old people ETC. based solely on the fact that I am competent in avoiding a situation. I did exactly what I felt I had to, to make it through that without ending up in a hospital bed.
Don't think that I think I am MR EXPERT, and there is always room for improvement. I have my classes under my belt to practice good habits. Even in ERC and MSRC it was stopping, and evading, but not a single horn used those days.
Your right, I will see about a aftermarket horn while trying to make everyone aware (aside from my exhaust) of my presence on the road.
Look twice, save a life!