Originally Posted by ls01

Yelling at motorists is a waste of time ( I know I can't believe I'm saying it either) They enjoy it. It let's them know they have elicited the reaction they wanted. They are bullies, they wanted to scare you, when you yell they know they did scare you. Give them the finger instead. That tells them I know what you were trying to do, you failed, and you, Sir, may go intercourse yourself.
Do it calmly, and as deliberately as possible. It gets the point across. And is less stressing on yourself.