My experience at BYU was little different because I was in a few different departments (Political Science, Economics, Philosophy, and Korean). Different departments seem to adapt to different viewpoints. The political science department was more liberal and the economics department was extremely conservative. However, because of BYU's generally conservative base, viewpoint diversity was widely discussed.
I remember lectures on can a Mormon also be a democrat, that were more focused on having diverse viewpoints and not really advocating a liberal or conservative position. I also remember a similar discussion in a philosophy class of budhism that also encouraged diverse opinions.
At the University of Wisconsin, I had a polical science profession that mentioned (and shared) the same viewpoint mentioned by the Duke facilty (that conservatives are dumb and therefore cannot be hired by a University). I was also pulled up in front of a class religous freedom and was widely criticized for saying that people should be allowed to express their religous views in a community forum (even at public school). Also, when I was teaching, I had students complain to me and the department for my teaching of conservative viewpoints and/or suggesting critisms of liberal viewpoints.