For some tragicomic relief, SurvivalBlog reader M.Z. recommended this
pictorial article: http://www.ar15.com/forums/topic.html?b=1&f=5&t=414704&page=1 showing
the civil war in Liberia. I surmise that a few squads of soldiers that
was trained to aim and use fire discipline could
clear the city of this riffraff in short order.