One difference between learning the halochos of tznius in the beis medrash and discussing them here is that here many of the posters are (or purport to be) women. I’m not a man, so I don’t know what, if any, effect this may have on men discussing the issue.
I do know that concerns were raised on this board regarding a specific discussion between a (self-identified) man and (self-identified) woman on this board. That particular discussion began in a tznius thread.
I do agree SJS’s post, which really made the same point.