You have GPS on your phone. That means if they wanted to, the government can figure out where you are. And how Google uses your current location and an aggregate that includes your previous searches and what you clicked on to determine what results are best suited to show up in whatever search you’re conducting at the moment.
In Little Brother by Cory Doctorow, protagonist Marcus ends up at the wrong place at the wrong time, and is picked up by Homeland Security. When he and his friends are finally released, he realizes that his home has become a police state, and everyone and anyone might be a terrorist.
Here’s Cory Doctorow talking about “Little Brother and What Orwell Got Wrong.”