I think its better if they get detention and Quit Smoking assistance

.... and i'm sure there is students sneaking off at lunchtime to have sex too, is the senior campus going to give these guys a room to stop them going off campus? I mean, if they are over 16, they are legally allowed to have sex....
Yes you are quite right, there probably are students leaving school for other legal activities. It's not compulsory to attend school after 15 or 16 anyway. No, they wouldn't give them a room for other legal activities, it would depend on what the activities are.