Know your target and what lies beyond it.
If you're not shooting with intent to hit.....exactly what is your target?
Warning shots are reckless.
You either fired your weapon because there was an immediate need to neutralize the threat.....or you fired in negligence.
Agree 100% with the first 2.
What says a target 9intended impact) HAS to be a person?
Warning shots can be reckless, but like any other, if there is a safe receptacle available so a human doesn't need to die, they may occasionally have value.
A person doesn't have to have his hands around your neck to be a threat - situations vary and there may be a case where you are basically trapped, but the perp hasn't gotten close enough to inflict harm with whatever weapon. Under you precepts, no matter where or what, if it's obvious you can't escape, then shooting to kill is the only option. In a Black/White world that may be the case. In a million-shade-of-gray world, one has the opportunity to assess each situation separately. If I have to kill, I will not hesitate. If I have an opportunity to not kill, I will assess the ramifications. There are billions of potential situations. While a great many may dictate shooting to kill as the most reasonable option, 100% is never a standard when humans are involved.
I'm curious - what is your background that you feel qualified to state your "rules" as 100% certain 100% of the time?