Preventing cheating ultimately comes down to changing the incentive structures in the university system in America. Allowing students to take revenge on their professors by basing financial rewards and promotions on student evaluations is clearly wrong. The metric by which professors are rewarded should be as independent from what their students think of them as possible. Outside exams by an unbiased third party is one idea, but I'm sure there are others.

What surprised me more than anything was the lack of mention of any sort of organized protest on the part of the professors. The faculty at many colleges throughout the U.S. has protested a number of issues very successfully. You'd think there would be a more unified voice on this matter, but perhaps I'm overlooking an incentive that guides most professors to just not care.