No it would not be satisfying. The taking of a life would be a terrible thing to bear, even when justified.But it wouldn't it be satisfying to step out of your vehicle, pump a couple of rounds right into the radiator of the horn-blower, holster your weapon, step back into your car and drive away....slowly?
Once you go down that path, the recipient is now somewhat justified that you are shooting into his occupied vehicle and may return fire. You or he/she or both of you could end up dead.
That would be an example of escalating the situation.