There is a simple reason why governments can't 'Call their bluff', because they are the ones bluffing. They brag about representing 400 million people, but in f

There is a simple reason why governments can't 'Call their bluff', because they are the ones bluffing. They brag about representing 400 million people, but in fact they are mostly corrupt bureaucrats who take money from various lobbyists and were elected simply as the lesser evil. Facebook, despite its many flaws, is genuinely useful to many people, and governments can't simply shut down useful things, no matter how much they'd like to control communications. So governments even in semi-democratic countries have to carefully construct their lies, before they try to shut down a widely used site.