Feif Un:
It is a Michshal, but don’t blame it solely on Rabbi Falk. He specificly says in one of his books that everyone must ask their own Rov, and not pasken from his books. In addition, in his actual Shailos U’Teshuvos, he is more reasonable (or meikel, pick your poison) than the books.
I blame the sems (and the high schools that felt the need to follow or be judged “not frum enough”), who decided that getting normal American girls to adapt minhagim of Yerushalmi yidden is a good thing. (decided the rest is too harsh, even for Sems.)