Dr. Peter Fröhlich, a professor at Johns Hopkins University, typically grades his exams with a curve; the highest score receives a 100, and every other grade is scaled up accordingly. As you can imagine, just the existence of this curve shows how hard his exams can be. So how could every student in 3 of his recent classes achieve an "A" on their exams? By boycotting them, of course!
It took the collaborative effort of students in Fröhlich's Intermediate Programming, Computer System Fundamentals, and Introduction to Programming for Scientists and Engineers classes, but they all managed to "miss" their final exams. With the highest grade being a "0" the professor was forced to abide by his policy and awarded A's to every student. Bravo.