I wouldn't worry about the Customs officials on disembarkation. The cruise is over and you are on your way home.
But, I too have noticed the increased security and surveillance after 9/11. We've cruised twice since then. The first time we cruised after 9/11, October of last year, the security around the ship and harbor was extremely tight:
- before the ship left port we noticed bomb sniffing dogs around all the pallets being loaded.
- in some ports in the Carribbean even before we approached the ship we had to show photo ids; my husband even one time had to take off his hat and sun glasses so that the police could take a good look at him.
- when we finally arrived home there was National Guard posted.
Quite an experience but I felt quite safe.