It's frigging cold outside in the Montana winter. Smokers need to be warm too. Missoula's air quality sucks anyway. Missoula's economy is in the dumps. If you can't smoke in your dorm you shouldn't have to take mid-terms or finals.
Kids smoke because it's a stress reliever.
Without nicotine during study sessions, the drop-out rate will increase. If cigarettes are banned in the dorms then you better ban coffee because some kids smoke to stay awake. If UM halts smoking in dorms then everyone who walks in front of Craig Hall is going to have to smell a circle of 15 smoking hippies playing hacky sack. It will never work or even be enforced. Probably not, but it's the law.