As far as I understand, WhatsApp is not conducting any activities in Brazil.
There are people in Brazil who have downloaded the application, and those people are connecting OUT to WhatsApp, which is operating in America.
So all the Brazilian government can do, is BLOCK its own people from accessing WhatsApp through the Internet.
The question is, should the Brazilian government have the right to block websites that it doesn't want its people to be able to see?
Ultimately that's a problem for Brazilian domestic politics, and also a greater issue of human rights. After all, that's how we describe it when discussing the Great Firewall of China.
Brazil can apply whatever laws they want wherever they want. They just might not be able to enforce them and therefore non-residents might decide to ignore them. The same is true for everyone else.
There are people in Brazil who have downloaded the application, and those people are connecting OUT to WhatsApp, which is operating in America.
So all the Brazilian government can do, is BLOCK its own people from accessing WhatsApp through the Internet.
The question is, should the Brazilian government have the right to block websites that it doesn't want its people to be able to see?
Ultimately that's a problem for Brazilian domestic politics, and also a greater issue of human rights. After all, that's how we describe it when discussing the Great Firewall of China.