Most car horn use is an expression of a driver’s loneliness, masked as urgency.
Car horns should not only be all in the same key, but also the same mode. Doesn’t have to be major. I’ll take Mixolydian, even Aeolian.
Frivolous horn use should be per honk – $0.25 for the first second of duration, $1.00 each additional second. Call the oversight/enforcement system HornHeeder – like ShotSpotter meets EZPass.
Using a car horn for anything beyond a true warning is the same as when a dog barks out of lonesomeness, or chews its paw out of idiocy.