If by a "good " shooting you are using the legal term, I've never said it wasn't good. In fact, legally, it appears the shooter is well within the law. Now if by "good" you mean the smart thing to do or the right thing to do, I won't accept it. Starting a gunfight when there is no need to start one in order to save a little money just doesn't seem like a particularly good thing to do.
Saving innocents? Sure, that is a good thing. I don't even thing it needs to be quit so restricted, you might want to save some that aren't so innocent. But killing someone to save a couple of hundred bucks in a cash register? Nope, not so good.