I don't know brazilian law, but in my country (Sweden. I'm ashamed...) the Military office for Radio Communications (FRA) is recording all data crossing the border (which of course includes the data of all citizens, since the internet is borderless).

They certainly do not have evidence that every citizen and every foreigner (total 7 billion people) is a pedophile, terrorist or even a jaywalker.

I for one have lost any faith in governance in the information age, and will happily encrypt my communication. If I can sabotage for the organisations spying on me, that is a net win.