This is related to, but more specific than, What can we do to avoid questions that will attract bad answers?
This was motivated specifically by this question, but I think we could eventually have many philosophical Q&A. The choice to be a vegetarian or vegan is often based on philosophical and ethical motivations, and it is quite understandable for such topics to be of interest on Veg*n.SE!
Questions about health or nutrition are obviously answerable within StackExchange standards. Philosophical debates seem much more subjective. However, I'm quite willing to admit that I don't have a strong background in philosophy or logic.
As a community, what do we want to do with questions about morality, ethics, and philosophy? How can we ensure that when they arise, they're handled in a way that is consistent with StackExchange standards?