[BUG] People with anaerobic metabolism can still be strangled to death

[Vitatroll]

Happens to changelings too, which is far weirder for an organism that can survive borgification.

I used to have a problem with both of these, but then I rationalized it: the lack of need for air doesn't necessarily mean the lack of need for blood circulation. I'm not sure how this anaerobic metabolism works, but we still die without blood. That means it still holds significance, and that means cutting off it's flow to the brain would probably cause bad things.

I don't really care either way at this point.