Same for most social media style apps
If you are in a sensitive job don't use social media.
Even posting photos, without lat / long metadata is not safe, as possible to still find the location by comparing against other images and chance of some of those having location data (or even getting real people to ID the location for you using localish knowledge)
On a more prosaic note, never mind foreign spy agencies finding military personnel, anyone at risk from burglars figuring out local targets & jumping for joy when a social media post reveals they are on holiday away from their home address
Biting the hand that feeds IT
