Some of these would make things hilarious for us. Some of these are a necessity for living with a fatty. Minifridge with a lock in your room is a definite must have. Make sure that everyone signs a contract about what is getting paid by whom (there was a story recently about someone who roomed with a fatty that wanted cable and tried to make everyone pay for it). It doesn't have a whole lot of legal backing, but it can show that you acted in good faith while fatty did not.  Get a kit for your hygiene products (toothbrush, hairbrush, deodorant, etc.) and take it to the bathroom with you. Take it back to your room when you're done. Get a cheap wifi security camera. Tell no one. Leave it in your room and take a few minutes to fast forward through it a couple of times per week to make sure fatty doesn't invade your space. Make sure you let everyone know that your room is off limits for anyone. The camera is critical because the first time things happen they will deny that they went and stole your things and/or tried to steal your things and threw a rage fit.  Add an addendum to the contract I mentioned earlier about keeping the place clean. No food wrappers left outside of the garbage, no dishes left overnight in the bedrooms or common area, and no "funny smells" emanating from the bedrooms. Anyone with a funky smelling room that can be smelled from the common area will be reported to whoever owns the property so that they can go in and inspect it if the problem isn't resolved by the next day after bringing it up.