Originally Posted by
Eastbay1K
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If the OP's premise had any basis in fact, I'd never have seen CPB authorities on the jetway as I disembark, with dogs, looking for selected arriving passengers.
Quite a few years ago, I arrived at a U.S. airport on a pre-cleared international flight. A/c was small enough that I could hear uniformed officials asking a particular passenger if he was so and so as he exited the door, where the subsequently arrested him..
On a pre-2001 transit through HNL (where there used to be some semblance of sterile transit), CBP (or rather, INS back then) were stepping up document checks of passengers in the jet way disembarking to transit for the connecting code-share "through" flight.