I'm not sure there's a causal relationship. If you met a cow in the wild that wanted to be eaten, I think it would be ethical to eat it.
But I strongly believe that creating such a cow would be unethical.
I agree. I think there is no difference between creating an intelligent cow that wants to be eaten vs. creating a human that tastes good, and wants to be eaten.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.
Poster's Note: omg, it felt so weird typing "2012" up there.