Lately, I've been following an interesting conversation over at ScienceBlogs. In The Pipeline Problem, Chad Orzel, a college physics professor, argues that the lack of women in the sciences is not his fault. Sure, there are sexist pigs in every field, but he implies that the problem lies primarily in the grade school years where girls are discouraged from going into the sciences by disinterested teachers and peer pressure. Suzanne Franks posts a rebuttal: one cannot pin all the blame on elementary and high schools. Even university professors must shoulder some of the responsibility--their lectures may be turning young women off or their faculty ratio may not be so great. More subtly, they may not even realize that they've only invited male speakers to a seminar or show only pictures of guys on their recruiting website.
Sometimes we can make it perfectly obvious that this is exactly what they're doing.