My coworkers in NO sent an email. The claim that the levees were dynamited to spare some areas is making rounds in NO. Victims of disaster with nothing are sadly prone to rumor and inuendo. The victims seem to be blaming the local government according to the email.
Sadly in the days after 9-11 I remember wacky rumors. These idiotic rumors devolved into the regretable conspiracy theories that mar 9-11. I do not believe that anyone would blow up the levees. Such a calculated task requires engineers .