In another one of my lists, or spices to add to your bland roast of world you're cooking up articles, I consider variations on how home defense is legally handled. I believe I've considered this to some degree before, but this will be somewhat different, I think.
1. "Better let them know you're coming": In wild country, when the cowboys were around the campfire, it was most unwise to quietly walk up to their campfire. You made a lot of noise before you yelled out at a distance "Hallo the camp!". Otherwise, they shot you as in self defence, and shrugged at your stupidity if it turned out you had been innocent of evil intentions.
2. "Duty to Retreat": If you have the ability to retreat, or you believe yourself to be in only mild danger, you do not have the right to use lethal force in self defence inside your own home. If the burglar breaks in the front door, and has a gun, the question is....Can you retreat to the den? And from there to the kitchen? And if alone, from there, and out the back door?
However, if you're at a junction point where your retreating would allow the burglar to get closer to a sleeping wife or children, then you do not have the necessity to retreat any further. That is, if the entrance to the hallway to the bedrooms is in the den, you don't have a duty to retreat to the kitchen.
3. "Make sure he falls inside": If the burglar is inside the house, you're fine. Go ahead and shoot him. In this regime, sometimes policemen will privately advise the homeowner to 'make sure he falls inside, even if you need to help him fall inside'. This falls into the de jure and de facto system of laws. The law may state one thing, but if policemen, for example, are happily willing to overlook evidence that the body was dragged inside, then the actual laws are something else.
4. "The Castle": Your home is your castle, and you're free to defend it and your property how you choose. You may, if you choose, shoot a fleeing burglar who is running down the street with your or a neighbour's ten dollar radio in his hands. Some defend this with the point that if you kill the burglar today, he won't be threatening an innocent homeowner next week.
5. "Night and Day": In the Bible, it seems like there was a rule. If the burglar broke in at night, he could be dealt with by lethal force. If in the daytime, he could not. It seems likely this was because in the pre-electric era one could not safely discern in the night whether the burglar was lethally dangerous whereas in the daytime one could. As a further extension, it seems likely this regime would allow the killing of an armed burglar during the daytime.
6. "Could I have some tea, guvnor?": The British, at one point, had severe enough laws against gun use in crimes that a burglar would surrender, and then politely ask for some tea while everyone waited for the police to show up.
7. "Criminal Self Defense": In a bit of law also British, but more modern, and hence lacking in what normal people call common sense, the homeowner may get in trouble. A criminal broke in, and was taken to the ground by the homeowner. The criminal was released the next day. The homeowner, a few days later, was informed that he was to stand charges for assault and battery.
8. "Turn the Other Cheek": I think this is an improper interpretation of the Bible, but some have held that you should help the burglar, and indeed offer him the silver cups to go with the silver forks he's stealing. This technique may have the virtue of causing the robber to reconsider his life of crime, and also become a Christian.
9. "Eric's Reasonable Rule": If he's trying to break in...warn him once, and then fire. If he's inside, and its not completely clear that you totally have the drop on him, or that he's otherwise at your mercy...fire until you feel he is no longer a threat. If he is stealing an item, warn him to put it down, surrender, and if he refuses then fire as needed. If he is outside the house, with property of yours, and is clearly not going to go around the house, you may fire into the air or ground, but you may not attempt to kill him.
10. "Rascist Preferences": This could be in a world such as ours, but more extreme, where if you're a minority you can do pretty much whatever you want and get off. And if you shoot a thug, he will get off, and his buds will threaten you in front of policemen who will do nothing to protect you.
Or it could be simply a more straightforward rascism...you are not a member of the elite. You shot a young punk member of the elite. You're toast.