They should shut down access to the whole internet in Brazil, then. It happens to be full of companies, forums, services and data networks which probably don't

They should shut down access to the whole internet in Brazil, then. It happens to be full of companies, forums, services and data networks which probably don't give a rat's sit-upon about what the law in Brazil or any other country says but just keep on transmitting messages and bits from user to user. I don't think being a messenger should come with obligations to divulge private persons' conversations or, more generally, bits to anyone. Local laws can force local companies to do so but it has nothing much to do with internet: a letter remailing company (or, the post office, as we used to say in the 1900's) could provide similar service. To generalise, all private communications reduce down to talking in private. If you really had to, you could talk to your friend in private and there's nothing any government could do to retrieve those conversations back after the fact. Technological means just make the communication more flexible but it should not mean the conversation should become less private just because it happens on the internet instead of the local backwoods. In fact, when governments (across the globe) do that it will only motivate creating solutions which make it impossible for the company to hand over their customer's data, with end-to-end and client-side encryption. Yet all governments do see that it's their right to make demands because it's always the easy thing to do.