>>A complete mandatory evacuation would have accomplished two tasks:
1) no looters; and
2) people not feeling the need to stay in their homes to protect against looters.<<
Martial law was not declared until after the storm went thru. That prevents "A complete mandatory evacuation".
Information released last evening confirmed that martial law has not been declared - civil authorites are still in control of the relief efforts.
I remember hearing about a mandatory evacuation from New Orleans. The ones who stayed were those who could not get tranpsortation out of the area, the sick and the elderly. This mandatory evacuation did nothing to prevent the looting which is going on.