Just checking cell phone tower usage.
The only thing this would give you over that is finer grain data, but it is already pretty fine to start with.
And the solution to both of those is the same: Turn your phone off (actually, leave it at home) when you are going to go meet with your friends to overthrow the government. You know, revolution 101.
Right, available to state actors, but not available to questionable organizations that are not (yet) state actors.
Edit: No, wasn't thinking Google. Thinking more along the lines of political parties not yet in control of their respective governments, vigilante groups, etc.
Well, I guess you have a point there? Not really sure what it is, but that is a distinction... Assuming google don't have cell tower access as a function of Google Fi.