I refused a prize once. My reasons were mingier than Sartre’s, though not entirely unrelated. It was in the coldest, insanest days of the Cold War, when even the little planet Esseff was politically divided against itself. My novelette “The Diary of the Rose” was awarded the Nebula Prize by the Science Fiction Writers of America. At about the same time, the same organization deprived the Polish novelist Stanislaw Lem of his honorary membership. There was a sizeable contingent of Cold Warrior members who felt that a man who lived behind the Iron Curtain and was rude about American science fiction must be a Commie rat who had no business in the SFWA. They invoked a technicality to deprive him of his membership and insisted on applying it. Lem was a difficult, arrogant, sometimes insufferable man, but a courageous one and a first-rate author, writing with more independence of mind than would seem possible in Poland under the Soviet regime. I was very angry at the injustice of the crass and petty insult offered him by the SFWA. I dropped my membership, and feeling it would be shameless to accept an award for a story about political intolerance from a group that had just displayed political intolerance, took my entry out of Nebula competition shortly before the winners were to be announced. The SFWA called me to plead with me not to withdraw it, since it had, in fact, won. I couldn’t do that. So — with the perfect irony that awaits anybody who strikes a noble pose on high moral ground — my award went to the runner-up: Isaac Asimov, the old chieftain of the Cold Warriors.
(Ирония ситуации еще и в том, что "Двухсотлетний человек" Азимова лучше легуиновского "Дневника Розы".)