You think that argument stops at Facebook? Why won't it apply to the VPNs people use to get around the geofencing on Facebook, to all the other social media platforms, to all messaging services, and so on? Now you've blocked huge swaths of services and fragmented all the platforms.
I think, if The Hitchhikers Guide to the Galaxy was remade today, the quote would be:
"…an utterly insignificant little blue green planet whose ape-descended life forms are so amazingly primitive that they still think social media is a pretty neat idea."