I think it is absolutely appalling what these young men did. The women who were the subject of their vile - and violent - comments must have felt so belittled and betrayed because they had thought of these people as friends and equals.
I'm not sure what the answer is. I tend to think they should have been asked to leave but I sort of agree with trisher that that doesn't really address the overall troubling issue of the violent thought and language directed at women, which appears to be quite common in all areas of public life. Rather than just targetting the individuals who get caught expressing these thoughts, perhaps women and men should spend more time discussing these issues
With regard to the significantly higher number of male suicides, I think it is fair to suggest that uncontrollable anger and a wish to punish, rather than sadness and depression, is sometimes the precursor to suicide. Although not unknown, it is very rare for women to murder their partners and children because of a loss of control over the partner/family and then commit suicide themselves, whereas it is a more commonplace occurrence with men.