Trying my best,
Any discussion on an internet message board between men and women can (and has) become too personal. On this board, however, the moderators take great care to steer discussions away from topics that they consider inappropriate for men and women to discuss. Since personal details/ discussions are not an intrinsic part of most topics discussed, this is an achievable goal. Of course sometimes moderators edit/ delete posts or close topics to accomplish keep personal details/ discussions off the board. And many topics that would be completely accepted on other message boards are not posted here for this reason (either because nobody posts them in the first place or the mods don’t let those topics on).
To properly discuss many aspects of tznius, one must discuss personal details that in most other contexts would perhaps not be discussed on this board, expecially between men and women. Whether it is appropriate to discuss these details in the context of a thread about tznius is a matter of opinion and of course for the mods to decide.