In some cases we might want a social media company to be able to see our “private” messages, such as if someone was sending us death threats. We might want to report that user to the social media company for a ban, or to law enforcement (though many people have found law enforcement to be not helpful), and we want to open access to those “private” messages to prove that they were sent.
Private messaging creates’ an expectation of privacy, but there are situations where limited access is necessary to protect users from threats or harassment. The challenge is designing systems that allow reporting and evidence sharing in harmful situations without turning routine private communication into something routinely monitored.