what if some student has outside friend(s) come stay over and roam around the dorm room as they please? What is your recourse? Who is going to handle those situations? What if they're really stinky and make strange sounds? What if they sit around in their underwear and scratch while watching MTV all day long? Who is going to police it? What is your recourse?
People who sign a contract with a housing provider expect to get what they contract for. They don't expect to have extra people sleeping over all the time or constantly using their shower or peeing on the toilet seat.
If you don't want to obey the contract, don't sign it! How easy is that concept?