David Bernstein has thoughts.

I found this anecdote interesting:

I was once grilled by telephone, after the official interviews, by a senior professor regarding my views on affirmative action when being considered for a lateral chair, with the explicit premise that if I didn’t pass the quiz, the professor would vote against me and rally her allies against me.

This probably isn’t common — as I noted in my review of Closed Minds?, most conservative professors say they don’t think anti-conservative bias happens much — but it’s a sobering tale nonetheless.