Bennet Cerf once said I get 4 miles to the gallon in my automobile, and my teenage son gets the other 20"
I taught a (surrogate) step daughter.
One day at temporary traffic lights our car was pliterally 2 seconds longer getting into gear and the idiot behind started leabning on the horn.
Despite my direct visual answers and the "L" plates prominently displayed.
I counselled her "It's your decision, you have a leathful weapon in your hands and when they asked why you crashed, his horn will have disappeared along with him"
her mother did report that any time she was hassled she just shouts at the driver "Its MY decision buddy"
She was a model pupil if a bit timid at times
I couldn't have done it with her brother and he is no hothead.