E-mails are hosted on American servers and likely this affects other Americans (assuming you're one too). You cannot waltz into an account that is not your own

E-mails are hosted on American servers and likely this affects other Americans (assuming you're one too). You cannot waltz into an account that is not your own and make changes. It doesn't matter if the user is in Brazil or not, the United States and them have an extradition treaty signed back in the 1960s. If an American agency thinks that a Brazilian is involved in a serious breach, they'll make use of that treaty to the best of their ability. Don't forget about about the efforts made to try and get Gary McKinnon. I don't care what altruistic goal you have here, you do not go and do this sort of thing. It's far from appropriate and you shouldn't go around trying to excuse it because they're of some nationality. You should not assume you have not compromised an investigation here.