Well in Canada, you have gone to your safe, and unlocked it, gotten the ammo, loaded your firearm so if you where able to do that, you are probably awake
While I agree with the responsibility of the firearm owner to account for any bullets they fire, I do not see disorientation to be a factor from just being startled awake - sleep deprivation causes a lot of judgment errors, but outside of the immediate time of waking where one may lash out, there is no appreciable disorientation (unless they have alcohol or drugs in their system) as the adrenaline has kicked in for fight or flight.
The post you replied to seemed to be quoting me, where I was differentiating the threats -- firstly I think most people would know the difference between an intruder being in their room - and one not. I have cameras, and electronic locks and a few other things to let me know where people are in my house.
If a neighbor shoots at you in your house from theirs - well that is a significant difference from what we had been talking about.
