I don’t see what the big deal is, it’s not as if they’re forcing males and females to room together. This is only if two people of the opposite sex insist on being roommates, the university allows it whereas before it didn’t.
Cohabitation isn't “allowed” so GF and BF shack up in GF’s or BF’s dorm room every night; much to the chagrin of the roommate who now has to share a small place with TWO people who do naughty things to each other.
This happened to me in the USAF. Except they didn't alternate, it was my dorm room every night. They got married and had to wait a month for off campus housing, so I was defacto living with newlyweds with my bed not ten feet from theirs.