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Isn't the point of the giant world wide surveillance apparatus run by the NSA, etc. meant to let them know this sort of thing before they even buy a ticket for

• smsm42 10y ago
  You can't really find out in advance if someone intends to overstay their visa by surveillance. Surveillance is not magic, and mass surveillance has a problem of collecting huge mass of junk, and no agency, even NSA, would have resources to sift through this junk enough to find trivial matters like intent to overstay visa, even if that information actually was there. Surveillance may be useful to detect highly anomalous behavior, or to detect connections between people (e.g. is Mr. X connected to known terrorist Mr. Z?) but I don't see how it can be useful in trivial matters like immigration enforcement.
• CaptSpify 10y ago
  > but why pay for something that's not working? Because it's The American Way! We spend so much money on programs that are proven not to work, it's embarrassing.