A question I've always wondered -- If Google, or an employee at Google, used ML (or just classic techniques) to analyze the enormous, enormous troves of trojan horse data they have on the employees of virtually every organization across the globe, would it be illegal if they traded on that data? They could surely accurately call virtually any trend before anyone. They could see when morale at a firm drops, when hours drop, when employees start trying to get jobs elsewhere, etc. It is simply shocking the amount of data they have coalesced.

And while I generally have a good opinion on them, a product like this just seems like a step too far and risks threatening the trust users have in them.