Colin Diver, a former dean of the University of Pennsylvania Law School and a former president of Reed College (OR), writes:  Yale’s law school made the stunning announcement last week that it would no longer participate in the influential rankings published annually by U.S. News & World Report. Given the outsize importance attributed to the rankings by prospective applicants and alumni, Yale’s decision sent shock waves through the legal profession, and indeed all of higher education. Yet the law schools at Harvard, Berkeley, Georgetown, Columbia, Stanford and Michigan quickly followed suit. Will the universities of which they are a part join the boycott? Will other colleges and professional schools do the same? Could this be the beginning of the end for college rankings? I sure hope so.