Well, what can I say...
I don't blame the guy really, the kids were on the street so he shouldn't have shot but at the same time I understand if a guy who has no idea this kind of games exist is trying to protect the property from a very shady car parked right outside at those hours.
Like I said in another thread before, this game can be a potential target for future lawsuits against the Pokemon Company, Niantic, and others involved.
I get that people get excited and everything but I think that going to a random residential area at 1.30am and stop there in front of a house for several minutes without leaving the car will make people around nervous. I would really think it's only a matter of time before I am being approached by someone from the neighborhood, it's the normal thing to happen.
It's natural for people to protect their families so I really don't blame the guy at all. It was bad judgement to shoot but I understand he was scared, in the other hand I blame the two guys in the car for what happened. The kids, even though they were not breaking any law, did something that obviously was going to raise eyebrows around the neighborhood.
If I see a car parked outside my house with the lights on, at 1.30am, and staying there for several minutes, I will go out and ask them what do they want, but I will also try to protect myself in case they are some kind of criminals. I think that reaction would be very normal for anyone in that situation.