Jeff Jacoby writes:

Academic freedom is not only meant to protect professors; it is also supposed to ensure students’ right to learn without being molested. When instructors use their classrooms to indoctrinate and propagandize, they cheat those students and betray the academic mission they are entrusted with. That should be intolerable to honest men and women of every stripe – liberals and conservatives alike.

Plus Professor Bainbridge has links to more on that subject in The Economist, Opinion Journal, and an op-ed written by George Will.