The Supreme Court doesn't cite too many scholarly works, so it's a thrill when one of yours is cited -- at least until you see your piece has been forever inscribed in the annals in support of a proposition that's exactly the opposite of what you meant to say.
UPDATE: Orin Kerr has at the censorious scholar. "Scalia agrees with and cites Walker’s descriptive argument but then disagrees with Walker’s normative views." That's the risk a scholar takes, of course. You can still be mad about it, you can probably get a spot on an op-ed page where you can vent.