Pardon me - and thanks for pontificating.
The purpose of the thread was to bring some reality to posts in a previous threade where folks said they would just open fire at the slightest provocation. Challenging or ID'ing the possible threat was not part of their plan.
I intended to point out that life is more complex and show a realistic scenario that could happen (has happened to me once, BTW) and see if the blood lust crowd could see the point.
Also, FYI, in various FOF training scenarios, folks practice what to do with an intruder at the door.
So, your initial conjectures about the thread are off base and you missed the point in your self righteous pontification.