The implications for the girl are severe and they will affect the rest of the family too. BY’s chinuch might even be questioned. For what gain?
What SEVERE implications?
You quote that is assur, yet Rav Nissim Alpert was a Rav HaMachshiur there. If Stern was treif (Or any part of YU for that matter) would he have been a Rav HaMachshiur there.
The only severe implications is the tuition cost , I think its like $31,000 a year room and board