First of all, this is a ban on freshman rush and not on frats on a whole. Regardless, i'm betting that there are going to be some new secret societies popping up in the coming years...haha
at princeton, the frats don't really have a big presence on campus though (~20% of students are involved at max) and don't have frat houses or anything like that.
honestly, i feel like this was a really unneccesary move by shirley. the frats don't have any negative impact (at least that i've seen around campus), and basically function like any other club on campus (plus a bit of extra hazing 🙂)
regardless of this ban on freshman rush, the eating clubs are basically frats in and of themselves and those definitely aren't going anywhere.