Probably not. I take it as uncontroversial that some people are insane or mentally unstable and their wants/desires should not be fulfilled. The way to probe this possibility is to ask for a justification of the want/desire.
So, you'd ask the cow to derive ought from is?
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.