Greg Mankiw is a Harvard economics professor, author of a best selling economics textbook, formerly on Bush's Council of Economic Advisors, and blogger who doesn't accept comments. His most recent post recounts his time on jury duty--he was peremptorily challenged and observes the: "The only information they had about me at the time was based on a brief questionnaire, which did not say much more than my name, address, and occupation."
Why do I say it was a stupid moment? Because IMHO Mankiw underestimates his fame, particularly in Boston, and the ability to research him. I'd guess the lawyers at least had a laptop, on which they could and would Google the members of the panel. Given his relative conservatism, I would guess the plaintiff's attorneys filed the challenge.