The really sad thing about it is, I don't think most of the posters think they're being sexist.
the best hope i have considered is that most of the posters are just posting to show their signature ads, as your signature warns against. i would not like to be believing they are thinking with depth about the content.
That could be partly true. But you should also consider the fact that people from around the world have different views on gender equality. Some cultures still put women a notch lower than men. I am not going to judge them for behaving in such a way for it is the way things are in their place or country. Neither should you.