> You’d have to X-ray each container to know what was in it in the first place. Prohibitively expensive and would hurt exporters.

I'm fine with increased costs if it means saving our privacy in communication.

And you wouldn't need to scan every container, some sampling % would be sufficient.

> some sampling % would be sufficient

From what I understand, this what happens currently and allows stolen cars to pass through

Shouldn't there be enough information about the shippers to make arrests for the cars that are caught?

If not, begin a proper investigation and start collecting that information. I'm generally against KYC regulations, but a limited and targeted investigation seems appropriate here.