KingIf Lemmy became popular, what would prevent any three-letter agency from opening a server to get all the user data?
scoobfordNothing. A social network is a public forum, and you have no expectation of privacy on a public forum.
DMs are the exception, and it should be explained to users that they are not private. E2E DMs would be cool, but the potential for spam and abuse is just too high.