@datapup@mastodon.social the warnings are misleading in that sites that aren't "trusted" are assumed to have malintent rather than to just not have that functionality. ostatus has been kicking around for about seven years and there are a good bunch of extant networks so it becomes a kind of sabotage. other social media have implemented DMs via private instant messaging – diaspora uses jabber, which is pushing 20 years – kinda sectioned away from the stream. a lot less potential for leakage.
@datapup@mastodon.social with such an implementation you just can't reach profiles on servers that haven't implemented the system, rather than publishing anyway and having private data go public or relying on a growing population of users to keep track manually of which servers will allow them to maintain the level of privacy mastodon instances would.