the beginning of the end.

[NorthernRaider]

Most urbanites will be made very unwelcome in the food growing areas after TSHTF, but I actually think many of them will not leave the urban areas until its already to late for them IE after they have exhausted all their local supplies, after they have started to weaken and they will then leave along routes already stripped bare and are likely to find themselves being predated on by others as they try and leave. Hunger, Starvation, Cholera, Typhus, E coli, Salmonella etc will thin them out and should those survivors find a place in a rural area in which to start a self reliant erm! Commune they will then need to start learning agriculture from scratch and it will take at least two seasons before they can grow enough food to sustain themselves. That's before we consider the race, creed, colour, social status issues that will also result in much violence. I do now think that a few VERY highly skilled young fit, well educated and determined folks will probably be able to survive and thrive in abandoned urban areas through scavenging, guerrilla gardening, fishing and hunting, but unfortunately few areas of cities are capable of sustaining more than a handful of people.