They're listening, but not to your voice or with a microphone. Facebook is listening to your data--to all of our data, all at once. They have locations, searches, clicks, messaging, photos, hashtags, and any other form of browsing patterns for everyone in your country, everyone in your neighboorhood, everyone in the same room as you. They have enough data with such advanced analysis that on occasion they can get real…
If I had to give my father some reasons why this should concern him, I'd come up blank. Maybe you can fill in a few.