This is a very interesting thread. The answer to the question tells us more about the person answering than anything else. That, and the terrific horde of 8 year-old dandelion thieves must be stopped.
Show me a man willing to gun down a child picking dandelions in his yard and I'll show you evil that no law can stop. To think that law is all that stands between our society and dead little dandelion thieves is pathetic. That many here find examples like this useful illustrates the power of collectivism. Once the mind becomes accustomed to government and society dictating decency, then all decency need be dictated. It seems these folks think better to err on controlling people too much, and protecting others more fervently, than to trust or endure the free individual.
Thankfully, most of the people here understand that all good things need not be specified by law, and that it is better to govern lightly and favor the individual than to coerce and prod to the point that law becomes a morass. There is no set of rules that can capture every event where one might defend property with deadly force. Inevitably any attempt will lead to confusion, doubt, and arbitrary legal outcome dealt by bureaucrats and juries. And precisely because law is administered by people it is best to govern lightly, to govern clearly, and to leave the vague and the imprecise to the people. And if one outcome is that thieves live in fear, then all the better.