REUSING PAST EXAM QUESTIONS LEADS TO TROUBLE. I would hesitate to say “too lazy” here, though — writing multiple-choice questions for exams is hard, and you have to write a lot of them, and it’s easy to write one that’s more ambiguous than it seems to the writer. (That’s one reason why I don’t use them; another is that the actual practice of law doesn’t involve many multiple-choice questions.) But I was warned very early in my career that reusing exam questions often leads to trouble, and the growth of the Internet only makes that problem worse.

Ilya Somin has further thoughts.