Yes, I would love to dive with such a person ... especially if they don't have a redundant airsource! I would sneak up behind them and shut off their air... Ha, ha, ha... Just to see them begging for my octo ... he, he, he, .... especially down at 90 plus feet ... ha, ha, ha...
Of course, that would be cruel...
No big deal! Ever have a roll off? You learn as a diver to deal with it! I learned to dive that way, go ahead make my dive!
I will render aid if it is possible and safe, because it is my air and life!
I will render aid and air if it is within my training to do so, because it is my air and life!
I will render aid if it is possible if it does not put a third party at risk, because it is my air and I am the one who decides based on my assessment that it will not hurt a third party or myself.
I will render aid if it is possible and safe to do so under the existing circumstances without risking more lives.
I will dive with you if you have DAN insurance and do not put a third party or myself in jeopardy because of poor judgment, Equipment failure, or Panic.
I will dive with you if you understand your responsibilities while underwater to your own safety and that of others.
With the understanding of these rules I will, if your buddy, do whatever possible to within safe boundaries to get you back to the surface or to the starting point of the dive.
If you are not up to the same, then I will not be associated with you in the water environment as a buddy or any other presumed alliance.
At the end of the day I would want my buddy to go home, if I couldn't, but because it is my air I will make sure I can!