Not only circular citation. I think people generally have a problem with a chain of authoritative sources confirming earlier parts of the chain and adding their own information...
I hope not. What a trove. Imagine if we had every household conversation from the ancient Mesopotamians or even Roman times.
Nobody from that time would give a flying hoot that we know what they said and did.
The big area for abuse is now, during the person's life. afterwards why not seal it for a thousand years and then pass it all on unfiltered for the future historians and population to do whatever they want with.
heh.