To kill him? No.
To take woeful revenge against him in some form? Absolutely. That should not be a crime.
When I posted this exact same scenario after it happened here in Indianapolis I couldn't believe the amount of people who genuinely felt that the guy that was caught should be given a pass for killing a high school student.
Egging a car is wrong and he definitely should be brought in front of a judge for it and made to pay, heck if the guy just shot into the dirt and scared the living s#$t out of him I would consider that a great life lesson.