You don't fire at your neighbors. Birdshot fired upward (at a drone) is going to fall back down - after losing it's muzzle velocity to air resistance and gravit

You don't fire at your neighbors. Birdshot fired upward (at a drone) is going to fall back down - after losing it's muzzle velocity to air resistance and gravity - at terminal velocity. The terminal velocity of birdshot isn't fast enough to do damage.