Sleep eaters a dangerous lot. Dangerous to others (some of them, like this lady, cook baked potatoes in the middle of the night and leave the oven on) and dangerous to themselves (the same lady "found an open, half-eaten can of cat food and she was not sure if she had really fed it to her cat").
Could it be your husband? Your wife? Your live-in significant other? Aside from the obvious mortal danger these people present — and your cat going hungry — is your roommate sleep-stealing your expensive organic sea salt potato chips? Probably! It might be a good idea to padlock the fridge and the cupboards, just in case. Also, hide your cat.