I just finished an article about Jerusalem syndrome in Wired. It also mentioned two similar afflictions, Paris syndrome and Stendahl syndrome. Basically tourists become overwhelmed by the cities of Jerusalem or Paris or Florence and take a bit of a mental break.
It made me think that maybe tourists visiting New Orleans have a similar reaction. It would explain some of their behavior, certainly.
And maybe those of us who live here (either native born or transplant) are so inured to the crazy that we just don’t notice.