I mean, even democratic countries are using mass surveillance, not just autocratic ones. So I think, just like with mass surveilance, this “Social Media Investigation” would become the next step in the evolution of how technology is used against us, every country is gonna start scanning your social media.
I fear this has the potential of becoming the copied standard unfortunately. Fear of terrorism is like think of the children. All it will do is force people who need visas into having squeaky clean innocuous public profiles and operating anonymous accounts with actual opinions. Terrorists will do the same. So this privacy infringement will only catch really dumb people.