It is the law of the land since shortly after 9/11 that CBP is required to have biometric evidence that the person has exited the country. In some airports, the

It is the law of the land since shortly after 9/11 that CBP is required to have biometric evidence that the person has exited the country. In some airports, the I94 dropbox was literally just a dropbox in the secure area, and there was nothing stopping you from leaving as many I94s as you wanted to there, or even just dropping in yours and leaving. The fact that CBP is just now bothering to comply with the law should be more alarming.