This “new” rule has existed for years. I don’t understand why the Yeshiva World decided to make this breaking news.
And I don’t understand why the Yeshiva World posts something like this at all. Darchei Rachel is arguably the frummest ISRAELI high school in Yerushalayim, and many of their students are the type of girls who are more than happy to comply. This will not happen in any other Israeli school (proof: this incentive has been around for years and they are still the only ones who do it!)
And it goes without saying that it will not be happening in any American school, be it a seminary in Israel or high school in the U.S.