I had the good fortune of taking this course from Prof. Leiserson a good many years ago -- and ended up having him as my Masters thesis advisor.
His ethics pep talk, which is a mainstay of all his courses, are about not cheating on the take-home exams. I still remember him saying to the class, in a fatherly, earnest way: "You've got to learn to make friends with that feeling in the pit of your stomach" and to face the fear rather than give in to the temptation to cheat. One of the MIT CS department's great teachers.
