You may recollect the case, a few years back, in which Saudi religious police stopped teenage girls from escaping their burning school because their hair wasn't covered. 15 of the girls died.
In the Mishna on Page 20a of the Sotah tractate, Rabbi Yehoshua gives a list of people who are so negative they "destroy the world". His first category are the pious fools. On page 21b (today's reading) the Gemarah asks what a pious fool is, and gives as an example a man who sees a woman drowning in the river and doesn't try to save her because she isn't clothed decently.
That's pretty clear, isn't it? It's about 1,800 years old, that ruling, many centuries before the Middle Ages and their bad press. (And, I feel compelled to add, the Sotah tractate is not the most feminist one we have. Even so).
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