If it's an aspect of the game that you have to eat/drink/sleep to survive, it shouldn't be way too easy. You should either have to steal it, kill it, grow it, buy it, or actually make an effort to scav it to get it.
Playing with the eat/sleep/drink mods in FO3 has led me to feel that with those requirements there is a bit too much food available laying around and cheaply purchased.
I'm not too worried about it, if it's the same amount I won't care, but if I was designing it I would reduce the pre-war food a little.
