If things break down to the point where there is no reliable food delivery into your nearest inner-city, the gang-bangers will not be expected to sit around going hungry
Taking a clue from Somalia, you can expect the gang-bangers to come out looking for what they need. Realisticly speaking, you will expect them to strip the local stores rather than bother home owners, because that way they maximise the loot and minimize their chances of getting shot
Then when the stores are stripped the slightly slower ones will consider the homes nearby.