This is "computer says no (not a citizen)". Which is horrifying
They've just created an app to justify what they were already doing right? And the argument will be "well it's a super complex app run by a very clever company so it can't be wrong"?
When they decide that someone is in the US illegaly using the app... what happens? Is the person apprehended? Driven straight to the border? Taken into custody while more data about them is gathered?