Done out of anger, it rarely works. When someone honks at you in anger when in traffic, you might take time to self-reflect on what you've done wrong, if you've committed any antisocial behavior, and what you might do differently in the future, but most people don't. Because of their ego, they feel the need to defend themselves from attack.

Better yet, ram into the back of them so they really get the message.

I think the point is that you will do less to reinforce positive behaviour in others, than you will to amplify your own negative response conditioning.

Though I would add that if you sent your message across in a state of absolute zen then perhaps the reaction would be beneficial all round.