Until you discover he spent all his money on ammo and not food.
LOL!
But -- If he has guns that accept the ammo he has, he can take YOUR food or anyone else's food he desires...
The folks with food can't do much by throwing bananas at him...
The prudent "survivor" will have the holy trinity - guns, food and water --- and if REALLY righteous, isolation and privacy.
or if he didn’t like you much cuz you didn’t return his lawnmower.