After is-ought, the conversation ceases to be about philosophy, and philosophers cease to be philosophers. They become--well, just what is it are they doing? Advising?
Normative Ethics pushes the envelope into an alternative epistemological context, requiring, perhaps, a corresponding shift in the sense we use to explore its arguments. Upon seeing a memorandum from a board of philosophers charged with examining Ethics courses for state-wide transfer, one retired VPAA said, "I recognize the stench."