UCLA professor Peter Nonacs informed his students that the Game Theory exam would be "insanely hard", but, it would allow anything including talking, Googling, or hiring an outside expert as consultant, as long as there was no blood draws. In other words, students are encouraged, or, invited to cheat through it.
The actual examine went exactly as Professor Nonacs had planned. The majority of students signed up to share one copy of answers, while three lone wolfs submitted individual solutions.
Professor Peter Fröhlich of Johns Hopkins University had always used the highest points in an exam as the 100% (A), and calculate the rest of the class accordingly. This policy is public and effective to differentiate the differences among students, until they figured it out.
Last semester, in Professor Fröhlich's Introduction to Programming Class, students boycotted the final exam so that everyone ended up with the 'A' with the same highest point: 100%.