Department of Homeland Security has developed a plan. They have written a rule, no need for Congress to waste its time legislating, requiring foreign visitors, permanent residents and even naturalized citizens to disclose all of their social media information. Also to be collected are any movies they've watched, music listened to, Google searches, and family history.
The Ahnenpass (ancestor passport) was required for citizenship and employment in Nazi Germany. It required proof of Aryan blood through three generations. To become a member of the ruling political party proof of Aryan blood dating back 150 years was required.
This rule will allow the government to build dossiers on the entire population of targeted races and creeds, what they say to each other, and identify those natural born American citizens who commit race treason by befriending the targeted populations. The perverse irony is that they are using the "Privacy Act" for this invasion of privacy.
It's an ominous step in turning the DHS into the KGB.