FB that horn has real advantages. In my Boston days decades ago I loved having Mafacs that would howl reliably on hard stops. When a driver cut me off or pulled any other patented Boston move, I would slam on the front brake, then point to the offending car. Every set of pedestrian eyes for two blocks around would swivel toward me, then follow my arm to the offending car and driver. Driver would hear my squeal and look up. Guess what? Everyone he sees is looking at him. Driver slinks off like a scolded cat.
I loved those brakes. Sadly, with the new pads, they don't work nearly as well (as a public PA system; a lot better as stoppers).
Ben