No shooting of looters? How about marching some of them off in handcuffs? Maybe that would have an affect.
In the earthquake and fire in San Francisco in 1906, there was looting. And the Army was called out. If memory serves me, a few looters were shot. I'm tempted to say civilization hasn't improved in 100 years. Anyway, looting is one thing; shootings, beatings and rapes are another.
more than a few looters were shot in San Fran and the public hung a few too... http://www.fdungan.com/frisco.htm