This is getting out of hand. Bad enough bloody Facebook has entire continents of social graphs. Governments DEFINITELY DO NOT NEED THIS.
This is how you erode or work around legal protections for your citizenry. Once one country starts, others will implement the same, then the information sharing starts.
NO. Just NO. The cat is probably already well out of the bag, but the world really doesn't need this.
This is in the site guidelines: https://news.ycombinator.com/newsguidelines.html.
On another note, I can only imagine what some of the less-accountable governments would to do with this information if they looked at the DHS as an example. Any authoritarian government wanting to maintain their position above the public would love to have complex PII available at the execution of a query.
Been rewatching Person of Interest lately and kind of think that's Homeland Security's wet dream...