Outbound flights are going to get a hell of a lot more expensive if all the planes have to return to the US empty.
I suppose it will be another question on the form. Next to ‘I am not a terrorist’
Plus ça change, plus c'est la même chose
Sort of. The trick is to get the airline overseas to refuse boarding. (Probably) not unconstitutional because it's not US soil.
Just like how the US directs airlines overseas to refuse boarding if you show a US birth certificate and photo ID instead of a US passport.