There but for the love of God go many of us...except my particular air horn dream revolves around a good set of marine airhorns attached to my shopping cart at Costco, and scattering the drones who wander aimlessly like the damned from sample lady to sample lady...
Back in the '70s, my best friend really hated drivers behind with their brights on. So.....
He filled his trunk with car batteries, and mounted an aircraft landing light in his back seat. We got more than a couple of laughs out of that.