And the neat part is that you can have agreements within a group of countries (say about five) to have them surveil your citizens and share what they find with you while you do the same for them.
Technically true but as the commentator below you says, easily circumvented. Perhaps it's better to think of privacy/freedom of thought as a global human right...
We're been doing this for years in the UK. Not just at airports either, but the police actively surveil social media and arrest people for anything that might be considered remotely offensive.
I have wondered that. I have this one and a very VERY bland Facebook that I post something stupid on every 12 months or so. So in a strange way I have accidentally shielded myself.