I am always a bit skeptical of the liberal bias in academia thesis. I spent 5 years at a major private universtiy studying computer science and I honestly could not identify the political leanings of even one of my professors.
TH had an essay several months ago when college students were interviewed about being influenced politically by their professors. They chuckled at the notion of fossilized, antiquated professors peddling their ideas to a captive audience. Anecdotal of course, but indicative of the low esteem in which preachy professors are held. Most students are not Bambi in the forest.
Finally, all these liberal bias talkers seems to center around sociology, women's studies, and ethnic studies. Yes, these are liberal. Who gives a flying F. Tell me about engineering, pre-med, pre-law, business, marketing, physics, computer science, microbiology, chemistry. The people that are serious about getting real jobs are going to study in these majors. If I thought there was serious indoctrination in these areas, I might be concerned.