One of the reasons I don’t run my own webserver, or mailserver any more, or Lemmy/Mastodon instance now, is because I don’t want the liabillity of having to deal with content I don’t control. I’m amazed people run these at all, because it’s trivially easy to end up hosting very problematic content and get the attention of government in truly unpleasant ways.

I cannot imagine anyone anywhere in this chain wants the liability of trying to gatekeep content via ID like this. It’s a technical impossibility, and a liability quagmire.