[netsharc]

The NSA says they only monitor communication metadata. But that's already a lot of information. Let's imagine a scenario where FB can't read your messages, so it doesn't know what you talk about. But if you talk to people who are mostly Trump critics according to their Facebook activity, Facebook can probably categorize you as a liberal. If you added a new friend of the appropriate gender for dating, and your communication intensifies, Facebook can probably guess what's going on. If it intensified and goes quiet some evenings (predominantly weekend evenings), well, guess who's seeing each other (each guess come with probability percentages).