Campuses and the freedom of speech trap.

In the last few weeks we have heard about an increasing number of incidents on campuses across the nation where politically conservative speakers have been prevented from talking. From Middlebury College in Vermont to the University of California at Berkeley, these cases have something in common: They are giving higher education a bad name. Some op-ed pieces by liberal authors have criticized these incidents on the basis that they represent a violation of the basic principle of free speech, which is seen as a liberal principle