Here's a hot tip for the people who think they know guns. You don't point a gun at anyone you don't want to kill.
I completely agree. That's why it's dangerous to praise people for shooting in non-lethal situations (a guy who fires a warning shot at the feet of a dude he thinks is probably robbing his neighbor's house, for example). I agree, that based on the article, the guy who shot at the robbers was very likely responding to a life or death situation. If the bad guy comes in with a baseball bat and is breaking monitors, and demands money but isn't attacking anybody, then I don't think you have a legal justification for opening fire, but I'm obviously no judge, and it would ultimately be up to a jury.