Here’s a small, positive incident that has stuck in my memory. It happened several years ago when I was a graduate student.
One day in seminar, we were discussing a passage that ended with a rousing chorus to the effect that “all rational men” agreed with the author. (This book was recent enough that the author should have known better.) The professor, a senior male philosopher, read the passage out loud, then immediately added, “you mean all rational men and women, you sexist pig!” It was delivered in a funny way, and people laughed, but it got the point across.