And what good does it do when you're next to the guy at a traffic light? Then what? Option 1: Shake your head in disbelief how stupid he/she is. Option 2: Get into it with them, and make them pay a price.....but realize, you will also pay a price.
Option 3: Realize that it's not worth it, and they're just a bunch of stupid, inconsiderate, mother f.... that in another time, they'd be eating some knuckle and dirt.......but not now a days. Go back to option 1. Just walk away...or ride away. And be cognizant of the a holes that are out there. Fortunately, they're not the majority. Opinion of an old warrior.