See that's a little scary...don't you think shooting someone who breaks into your house is a little excessive? I'm all for defending yourself but there are surely smarter ways than putting a bullet through someone?
People are emotional and reactive creatures - a gun in the hands of one who is incredibly angry is a dangerous thing. At least in the armed forces you are trained especially for all kinds of situations - it isn't just full of trigger happy people who can't wait to kill/maim.