Yes this is an important point. Today we ask to people to use the forum, but this won’t scale for a million people I guess. We have to imagine other means, why not yours. It looks like very much like what cel used where he attached informations to its online identity.
Note how your protocol does not need to be part of the core protocol, but can be used above it. So you can already implement your proposal without need for our approval. It could take the form of a website, why not connected in some way to Sakia, or be an extension of ucoin nodes, any other solution you might have in mind, actually.