> landlords (even university campuses) have no business meddling in 'unwanted consensual activities'
Agreed, and I think GP would as well. Dorms are different. That's your domicile, the relationship with a university is that of a landlord/tenant. You're paying for a place to sleep and live. There's an expectation of privacy. If you walk into someone's dorm while they're having sex, why the hell are you barging into someone's room?
That being said seeing a sex detector hanging from the ceiling would make me sad.