How do you feel about things like say eating roadkill? Obviously I know pretty much no one is getting their meat only from road kill (and you couldn't pay me to eat that 🤢) but I do find it an interesting situation to think about wrt ethics
In a purely hypothetical context, and assuming you don’t believe that dead bodies hold any sort of spiritual or religious significance, consuming any dead body which has died from natural causes is an amoral act, though that only applies if no moral agents exist who will be adversely affected by your consumption. If the body wasn’t in the middle of a busy road and therefore accessible to other animals then it’d be a different story.
While eating road-kill doesn’t have a negative moral impact that I can see, it is also certainly not a morally positive act, either. The pervasive notion of not “wasting” meat has no real ethical basis, since it makes no difference to the creature being eaten or left to rot, but there are other beings who would have a use for that flesh. Removing a body from the road and throwing it into the woods so it is accessible to animals would be an alternative, morally positive way of dealing with the same situation, since non-human scavengers would likely have a greater need to consume it than we would.
We find the notion of eating road-kill disgusting of course, largely because of cultural norms, but according to a purely objective impact analysis there is no exploitation since no being exists to be exploited, and there is no harm since no one is being adversely affected. Of course in practice it wouldn’t work that way, if we were living in a context where eating animals were only permitted in that case then it would create an incentive for road-kill to exist, which would inevitably be exploited. It would also very likely create trade in dead animals and therefore demand, which would have a moral impact.
