MastOdon (capitalized o for spelling visibility) is not end to end encrypted. Nothing you do there is private. Either you trust, or you don’t. So as the other commenter said, self host is the only way to ensure privacy on mastodon.
There was in fact a recent event where the FBI raided mastodon admin’s server and got their DMs, posts, and all private and public history of all users registered.
Wait do crypto bros own the rockers now? 🤕