Location

Everyone is so used to sharing their location nowadays. The government knows your exact location, the big tech companies know your exact location, the kid your cursed at during an Xbox call of duty match knows your location.

If you don't know a person's exact location, you probably aren't important to them. You'll have to re-evalutate all your connections, even grandma. Make sure you also share your location with your enemies, as a warning.

*sarcasm*