The long and the short of this thread is that if you want to live in a spotless environment with no disturbances from people getting in late at night, you might not want to move into stalls (or with other students at all). There is a chance that your flatmates will be more messy than normal, but those are the chances that you take when you're moving in with people you don't know! Also, if you're the housemate who nags others to clear up (especially if you're being unreasonable about the level of cleanliness), your housemates won't like you and you probably won't get on.