I think that we agree that over some short period of time the stores will be looted first, then the aid trucks, and then roving mobs and individual renegades will begin pillaging house to house.
In Rio today, the rich already refuse to drive Ferraris because they’d be instant crime targets. Extrapolating, anyone with the appearance of having access to food is going to get mobbed/mugged/raped/extorted.
I’m not certain how long that goes on. If it gets cold then there are going to be house fires, of course.
...but if a city runs out of food altogether at every level, do the looters stay and slug it out over nothing or do they rove outward?
Mobs are funny beasts with their own “intelligence.”
If they rove outward, do they go house to house across yards, or do they follow streets and highways?
Do foodless mobs remain together after their first night of sleep, or do they break up?
Do they keep a consistent direction or do they meander or backtrack any?
As well as the lesson lemmings teach us, etc. Even if half of a city's population dies inside the city limits, millions will be strong enough to walk 100+ miles drinking ditch water, lusting for the food and water you are "hoarding."
"Trapping Feral Pigs and other Parables of Modern Life." (FR thread.)