You dont even know how the door works in order to claim it's going to be unlocked.
I say that not a moral judgement on you.
There are so many parties involved with an international shipment that anyone smuggling anything in this country WHICH REQUIRES THE CONTRABAND TO STOLEN AT THE PORT is a plan frought with 100000000 complications. No one would scheme in such a way.
The Port Operator has no influence over the degree in which Customs inspects any shipment. And since no one except Customs screens shipments there's no advantage you get by being a Port Operator.
The easiest way to get contraband out of the port, is to declare your cargo with an in-land port of entry (say, St Louis). Customs will issue a bond, the ocean carrier will send thier trucker to the port and the container leaves the terminal.
I'm not sure that I understand your point in saying that port and terminal operators are somehow free from responsibilities for security. First, they are not free from such responsibilities. Port and terminal operators are universally regarded as integral links in port security. The Canadian PIP and US Customs CSI programs both have initiatives for expanded cooperation and integration of operators into the procedures for port security. Operations and effective security simply cannot be seperated as if one is unrelated to the other.
Second, alliances with trustworthy operators are essential to the overall security picture. Operators themselves recognize this, and hence are generally cooperative with proposed "first-line" self-policing and mandatory reporting requirements. No one is under the illusion that rogue operators are acceptable because "security is someones else's responsibility."