Bad security all around (although area 51 doesn't have any data on it so seems they're the only ones capable of security lmao), people even in military bases, or various military bodies patrolling, keep their fitness data collection turned on which has highlighted a whole lot of sensitive information easily accessible online - https://labs.strava.com/heatmap/

There are even a couple places where there's a lot of activity surrounding an area, but no one goes inside which indicates that a fitness watch for example might be taken off before entering (which would indicate a sensitive area).

So basically, opsec is dead thanks to fitness narcissism. More fun threads -> https://twitter.com/AlecMuffett/status/957615895899238401