Feral cats usually die fairly early in comparison to kept cats. I have had a feral colony for the last 15 years, Im down to the last few of a pile of cats that were abanadoned or bred prolifically in my neighborhood. I guess when no living thing is worthy of any respect at all, Im gonna pull my own plug, as I wouldn't want to be around if I couldn;t make a difference too. IMO.
But 'til then , Flame away!