You think people using email know anything about email standards? RFCs? They see a "forward" button in their email client. Just like Facebook Messenger has a "

You think people using email know anything about email standards? RFCs? They see a "forward" button in their email client. Just like Facebook Messenger has a "forward" button on messages. No one is expecting a different level of privacy in Facebook Messenger over email because of the IETF.