The other reason he will never, ever go back to the US is because he's likely on a watch list now and will be denied any attempt to enter. It's a shame that ha

The other reason he will never, ever go back to the US is because he's likely on a watch list now and will be denied any attempt to enter. It's a shame that happened. The traveler has had an unfortunate interest in traveling to multiple countries with which the US has hostile relationships. And then entered the US in a slightly unconventional way by train via Canada. I think that's a stupid reason to deny entry because an actual "terrorist" would surely have fake documents anyway. Perhaps the moral if the story is to get a replacement passport without the stamps if you have travelled a lot and take a direct flight.