Said something unpleasant about someone ten years ago? Guess what, he's the sheriff now, and has money in the budget to buy social media data on his enemies, or the freedom to tap into any shared federal database he likes. Next thing you know, there's a speed trap at the end of your block and each member of your family gets pulled over each day for a vehicle inspection.

These sorts of things weren't unheard of before the internet. The abuse of big data just makes it easier now.