An article from Mas Ayoob has been making the rounds of the gunny sites lately, talking about when lethal force is justified. Related to that, a thread on the NOR asks "what are your opinions on lethal force. When should it be used, when are you justified".
I recently renewed my CCW, and we talked specifically about when you were and were not legally jsutified, and what the consequences would likely be, even in a justified shooting, and what your personal go-no-go point was.
For me, it's really simple; If I feel that me or mine are threatened with harm, I am going to stop the threat, by whatever means neceessary.
If I see a violent crime being committed in front of me, and I have the ability to stop it, I will do so by whatever means necessary.
If someone comes into my home in the middle of the night, I WILL percive that individual as a potential lethal threat, and I will stop the threat, by whatever means necessary.
I don't care about the legal justification issue; better to be judged by twelve, than carried by six.