The Road was a great movie, depressing but well done. They really did a good job showing what kind of hell you’d be facing if you were unlucky enough to survive a SHTF event that wiped out the plant life. Any sort of legitimate SHTF event would come with the same dangers they showed in that movie though, at least for a little while. Even if the the food supply was only shut down for a few months, I bet some people would be forming roving gangs who are willing to kill and eat their fellow man just to put some food in their belly’s.