Ngl, after 3 roommates kept stealing my leftovers, I put a cheap bike lock through the handles of my mini fridge in the common room. Yeah it looks dumb, but no one messes with it now. Has anyone else tried locking their stuff up or did you just give up and eat out more?
My old roommate Dave once padlocked a plastic tote in the pantry because someone kept stealing his protein bars. It worked great until he lost the key and had to cut the whole thing open with a butter knife. Now I just write my name on stuff in giant letters, since most food thieves back off once it gets awkward.