If I've gone to all the trouble to study for an exam anyway, just in case, then I'd much rather actually <i>take</i> the exam to check my knowledge. The article tries to paint this result as a case of solidarity and coordination, rather than slacking and intimidation. "on the day of the exam, all the students arrived half an hour early and stood outside the doors to make sure no one went into the exam room"; what is this, a picket line?<p>I had a few classes that had three exams and a final, and the grading policy dropped the lowest exam score. Even when I got 100% or more on the first two exams, and got explicitly told by the professor that the exam was optional and I didn't need to show up, I still took the last one, because why not check the knowledge I studied?<p>Given the intimidation factor, I'd probably end up asking the professor if I could take the exam outside of the normal class time anonymously, and leave people to guess based on who isn't in the same class the next term.