You should be careful who you road rage back against. If someone is in my way, I'll usually blow by them but if they decide to frack with me, I pay no mind in getting out of my car and grabbing the pry bar in my trunk and smashing their face in for fracking with me.... But thats just me...
You never know whats going through anyone's mind, sure he just wanted his donuts, but what if his wife was dying and it would be the last time he saw her?
You can't assume people are in their right mind when they drive aggressive.

Personally, I drive aggressively most of the time, but I also drive defensively. Always aware as to whats going on around me, I've had a few close calls but never have they been because of my poor judgement.