More specifically, it's a social network for sharing workout data. Sharing data is like, first and foremost what it's about. It has the same privacy controls you'd expect of social networks (public/friends/private both globally and per post/activity) as well as some that are special to a location-sharing app (hidden addresses).

This was either a gap in social media policy set for the guards, or a violation of that policy on the part of the guards.