 The biggest big brother of the corporate world, Facebook, had for years been compiling massive troves of personal data on Americans, even Americans without a Facebook account, as any page with a Facebook logo on it can send your browsing activity back to Facebook. And sometime in the mid-2010s, Cambridge Analytica hired a data scientist to put together an app that could suck down that data without Facebook's knowledge. Cambridge once bragged that they ended up with more than 4,000 data points on each of 230 million Americans.