Discrimination is going to be hidden much of the time when it is present, and I agree that such reports are troubling.  When I get some spare time I am going to hunt down the reports Bostonian referenced and see how convincing they are.  All I can say is that I take all the reports in this thread at face value, and that I may have been lucky to never have been in a corporate environment (except possibly one) where I felt any sort of gender-based discrimination was even a potential problem, and I've never seen explicit sex discrimination on the job.  I've also worked in environments that were quite pro-women.
I hope that at least some of the hazees were inwardly ashamed, and that that shame makes them stronger, better people in the long run.  I don't know which is worse, the prejudice or the people that go along with it out of ambition or fear.