I guess it needs to be said again. Ferguson is not in a state of anarchy. What Ferguson is in is a state of, well, statism. Due to the fact that the same entity that controls the police also controls the courts there is a severe lack of trust amongst the people. This is an inevitable side-effect of any system where one group of people hold power over other people. Eventually the subjugated people feel as though they have no options so they lash out.
Coercive hierarchy is a bitch.