Yesterday, I wrote about the Johns Hopkins computer science students who figured out a loophole in their professors’ grading system — if they all refused to take the final exam, they’d all get As. Which is exactly what they did. I was surprised by the harsh response of our commenters: “I’d have flunked the whole bunch of them,” one writes. “What happened here was blackmail,” writes another. While I understand people — especially teachers! — not wanting to condone a policy that seemingly rewards laziness with good grades, I don’t think that’s what happened here.