I think the problem is that when you cross the border to, let’s say, Canada, the agent you’re presenting your passport is Canadian. There’s nothing on the American side.

I’ve always thought all the information is exchanged between countries.

So, now we’re gonna see two rows of agents. The first American for the exit and the second, Canadian for the entrance. But that would create a buffer of no man’s land between the rows. Things can get interesting there.