Impatient nasty aggressive drivers

Several years back at my Sons school, The Lady in front of me is dropping off her daughter. She's ignoring the girl and talking on her cell phone. The girl gets out with all her school supplies and accidentally closes her Jacket in the door. The stupid Effin Lady takes off and drags the girl with her. Luckily the girl was able to run fast enough to stay on her feet. I'm There blowing my horn. Finally the dumb *** stops and reaches across the seat and opens the door to free up the jacket. She looked all pissed at the girl who got to walk back 1/2 block to the school entrance. True Story
I think autos should come with some sort of cell phone jamming device......