I yell at them. Loudly! Loud enough that people a block away turn to look. But then, when you're staring at your phone while driving your car out of a parking

I yell at them. Loudly! Loud enough that people a block away turn to look. But then, when you're staring at your phone while driving your car out of a parking lot and across the sidewalk where you only miss hitting me (before driving into oncoming traffic!) because I stopped, well you deserve that minor inconvenience of being embarrassed.