If I were the US government with aspirations of complete population control, I'd be using the NSA data secretly to build a database of every single person, and producing a "risk/threat score".
Every action you take online will alter this score. Every person they are connected to would influence their score, not unlike Google PageRank.
Slowly you build up a picture of every single citizen, and anyone visiting the US would also be subject to this, possibly triggered by a visa waiver program application or a visa application.
By the time you land on US soil and your passport is scanned, the immigration agent will simply be warned that the traveller requires x, y, and z actions to be carried out.
Every action you take online will alter this score. Every person they are connected to would influence their score, not unlike Google PageRank.
Slowly you build up a picture of every single citizen, and anyone visiting the US would also be subject to this, possibly triggered by a visa waiver program application or a visa application.
By the time you land on US soil and your passport is scanned, the immigration agent will simply be warned that the traveller requires x, y, and z actions to be carried out.
I'll get my tinfoil hat out now.