I just bought a set of air horns for my flstsi. 135 db. loud enough? scare someone into running over me? I am tired of being crowded.

 

Startled people usually react two ways. Both on instinct. They'll either move away from the cause in a rapid fashion. Or they move toward the cause in a rapid fashion simply because their muscles suggested moving toward it.

Now I fully believe in having the loudest possible noisemaker on a bike that you can have. But I also learned a long time ago that how it's used, and when it's used is more important.