@colleng He misrepresented himself, so if he gets in trouble, it will be his fault. This is what adulting is about. Keep the focus on yourself and your needs when talking to the RA. This would be a major dealbreaker for lots and lots of people, so you are not alone. I also wouldn’t want to live with someone who covers up the smoke detectors for any reason. Everything happens for a reason. Maybe you will find a roommate that you actually can talk to out of the situation?