MiddlePath -“Health, those points I made apply ALWAYS, and specifically in a situation like this, where it is so easy to slip up and say lashon hara.”
Wrong, not in this case where she should have s/o speak about her way of dress.
“And I don’t agree with you that it is a good thing to speak bad about such a person. I don’t think it is ever good to speak bad about anyone, anytime. Even in a circumstance where technically it may be allowed, which is very rare, I still wouldn’t do it. And I definitely wouldn’t be eager to do it, and nor should you, or anyone else. Just think about how wrong that is: “Oooh, look, I have an opportunity to speak bad about someone and I won’t get an aveira for it! I can’t wait to do it!” I’m sorry, but there is something terrible about that.”
Just so you know -you are arguing with the Chofetz Chaim. Speaking LH or doing any Aveirah isn’t Ossur because it’s not a nice thing to do. It could be it’s not nice and it could be it’s nice. It’s Ossur to do Aveiros because Hashem said so. In this case the Halacha says you should speak bad and it actually accomplished a purpose -because she got embarrassed about her way of dress!