In Fall 2016, Facebook users remotely geotagged themselves to the Standing Rock Indian Reservation, based in North and South Dakota. With their collective check-ins the users aimed at supporting protesters fighting against an oil pipeline construction in Dakota. The remote check-ins should obfuscate the Facebook geolocation data of the protesters, allegedly monitored by the police. More than 1 million users joined.
However it is unclear if the protest had the desired effect, police claimed that they did not track Facebook check-ins for the protest camp or elsewhere. [0,1]
[0] https://www.washingtonpost.com/news/the-intersect/wp/2016/10/31/why-facebook-users-are-checking-in-at-standing-rock/
[1] Baik, J. (2020). The Geotagging Counterpublic: The Case of Facebook Remote Check-Ins to Standing Rock. International Journal of Communication, 14, 21.