Unamused, let me fill you in on a couple of facts that are unpalatable to many, but are nevertheless true... I work as a chaplain in a maximum-security prison, surrounded by more than 1,500 inmates of the worst possible kind. Many of them are in prison because of drug offences - but that drug problem drove them to burglary, crimes of violence, and a bunch of other felonies. If they break into your home, they are willing to take the consequences of their actions, because their violent nature gives them the belief - true in many cases - that they can deal with the "average" householder. One of them, in particular, I watch very carefully - he broke in to steal what he could for drugs, was confronted by the (armed) householder, disarmed him by extreme violence (leaving him crippled for life), raped his pregnant wife so savagely that she lost her baby,... do I need to go on? I've never found a better argument for the right to keep and bear arms than 24 hours in a max-sec. prison!!!
I think jdege has it absolutely right. If I confront a thief, and he either flees or obeys my orders to the letter, I'll not shoot him. I certainly won't shoot if he flees with my property - I don't want to kill someone over something that can easily be replaced. I don't want to shoot anybody! - those who have had to shoot others will know exactly what I'm talking about... However, if he tries to resist, or does not obey my orders, then we're no longer talking about shooting someone for robbery - we're in danger from a criminal who has no business being on or in our property. The issue is now self-defence, not theft, and you can be sure that most of us will make an appropriate response. In the same way, if he flees and is armed, posing a danger to other innocent persons around him, this adds a whole new element to the equation. I'm not saying I would definitely shoot him under these circumstances, because this is more a law-enforcement function: but I'm not saying I wouldn't shoot, either... the circumstances would have to be the deciding factor in the specific situation.