Platforms like Nostr have a bridge problem. They can't effectively federate with users on other protocols. The issue is that posts from bridged users are "unofficial" in a sense. There's nothing stopping three different people from bridging the same user's posts to three different proxy accounts, all claiming to represent the original user.

What if that user wants to take control over the Nostr version of his account? Too bad! The bridge owner has zero obligation to hand over the key! In fact, the bridge owner can make the user do whatever they want on the Nostr side, adding and removing their posts at will. It's disappointing really. I don't have a good idea of how this could be fixed.