When I was an undergraduate, I majored in economics. I remember the faculty being fairly well balanced politically. I guess I'm just naturally inclined to be a devil's advocate because I remember having a tendency to ask questions and take positions that were adverse to the prejudices of each particular professor. I honestly don't remember ever feeling that I was treated unfairly by any professor for challenging his/her views and actually developed some close and friendly relationships with some of them.
Most of what I learned as an undergraduate came from the books that I read and not from any personal beliefs of professors. In my particular major, the trick was to really master the underlying principles and to understand exactly how they were derived. Once that was accomplished, the peculiar prejudices of any professor became more or less irrelevant.
Another great column, Cathryn!! You're still the best! ;-)
Once that was accomplished, the peculiar prejudices of any professor became more or less irrelevant. True, but in something like Con law or history, the professor may weave their own prejudices in as truth, and it becomes a problem.