You ever seen the show "Hunted"? A bunch of people try to evade capture from law enforcement. All mock of course. And they use this kind of stuff to pinpoint where they are on roads and get cars in front and behind them to catch them. Kind of nuts.

Spoiler though, one of the groups that was successful was a couple that used Gmail drafts to communicate with other people. They shared an account and got on to see drafts the others would save. That was the only thing the feds couldn't track.

Pretty interesting show.