You are grasping at straws.
Do you really think that self-awareness is a criterion for whether or not you can kill someone?
If so, then it's ok to kill drunks, people in comas, people with dementia... and depending upon how you define "self-awareness" even tiny babies, people who are sleeping etc.
Check out the baby in the womb fighting to avoid the suction machine trying to kill him. He seems pretty darn self-aware:
http://www.silentscream.org/
Kill people who cause physical changes to your body?
That would include the kids playing loud music next door... if it raises your blood pressure or keeps you from sleeping... fair game to go out kill the little b@stards?