This is one of the reasons I've switched to Apple, turned off all my location services, use various VPNs, and often leave my phone at home (or use my secondary work device).

Its astonishing what companies and law enforcement can do. For instance, people are concerned with some of Trump's laws/actions already. Why would we want to give him or anyone in such a position the ability to sweep up whole populations based on being near an event. It goes beyond that obviously, Google can predict movement and predict interests, even what you'll say at this point.

Eventually, law enforcement will be issuing a warrant on the model which predicts/represents you as well.