No you should not have that right. What good does it do? How often does someone who breaks into your house want more than your goods. They are not a threat to your life.
It's vigilantism. If the other guy isn't armed, why would you shoot him? The moment you pull your gun is when your life is in danger - that's when the us-or-them mentality kicks in, and you might just be on the short end. Before that the guys would be happy enough to get the fuck out as quickly as possible.

Bottom line is: If you fear for your life if you see a 13 year old with chocolate stained fingers in your trailer, guess what. You deserve to die. Don't fight it.