BigWill... I am sure that mistakes are being made, there IS still the human element here.

PMB - They have caught 9000 illegals to date, and are checking the majority of containers. Your statement that "no more containers are being checked out now than three years ago" was false, if I was you, I would be pretty annoyed at the person who told me this bilge.

As for "catching them red handed" ... In World War II, before D-Day, We went to great lengths to make sure the Germans thought the landing was taking place in Calais with Patton at the helm. It is a very basic concept in war that you do NOT tell the enemy what you are doing.