Here's Cecil Adams from the Straight Dope on Martin Luther King's, uh, shortcomings. I link to this because it contributes to King's de-sanctification. King was important as a catalyst for change, of course, but he wasn't the Messiah, and an occasional story pointing out his all-too-human faults is appropriate. Other plaster saints who don't get enough rotten tomatoes thrown at them: Albert Schweitzer, Nelson Mandela, Dag Hammarskjold, Bertrand Russell, Leo Tolstoy, Bobby Kennedy, Mahatma Gandhi, Simon Bolivar. Other nominations are encouraged.