Urbit does seem to have an over abundance of weird jargon and glyphs that reinvent existing technologies, it just reeks of techno-alchemy.
As to your second point, I'm curious if any decentralized system will ever allow for full deletion of information once it has been replicated by another client. Any gossip protocol, or decentralized CRDT document system has to take into account that a client will go offline and retain information once it has been released into the wild. Whether or not a request to "delete" or hide that information is followed through with is almost impossible to regulate. It's perhaps more important to realize that what we publish, may always exist out there.
That being said, clients could randomly ask for "tombstoned" information to verify that other clients comply to a delete request, but it will likely always exist somewhere.
As to your second point, I'm curious if any decentralized system will ever allow for full deletion of information once it has been replicated by another client. Any gossip protocol, or decentralized CRDT document system has to take into account that a client will go offline and retain information once it has been released into the wild. Whether or not a request to "delete" or hide that information is followed through with is almost impossible to regulate. It's perhaps more important to realize that what we publish, may always exist out there.
That being said, clients could randomly ask for "tombstoned" information to verify that other clients comply to a delete request, but it will likely always exist somewhere.