FlyerInHI — right now, the US doesn’t track who leaves the country by land, other than a few sporadic and pilot programs. Places like East Germany and Czechoslovakia did. Fuck that idea. Hard.
I don’t like the idea of creating such an infrastructure, because it could be used to prevent people with undesirable politics, people accused of overblown charges, “suspected” terrorists (or whatever) from leaving the US under a future government. There should be border controls coming in, but anyone should be free to leave the US without much trouble.
Borders are artificial constructs designed to preserve economic inequality anyway — it would be better if they’d gradually fade away over a few decades. Let people live where they want to and in the places that have the best opportunities for their chosen life path.