A “Library of Congress” for published web content maybe. Some sort of standard that allows / requires websites that publish content on oublic-facing sites to also share a permanent copy with an archive, without having the archive have to scrape it.
Sort of like how book publishers send a copy to the LoC.
There’s a problem there, though. The propaganda was basically various versions of “The government (when run by Democrats) is bad, don’t trust the government.”
If they put up a notice saying, “This domain was seized, here’s the real facts!” the target of the propaganda isn’t going to buy it for a hot minute.
If they put up replacement content that doesn’t mention the government seizure, tha target of the propaganda is already primed to shout, “Fake news!” at anything that disputes their existing worldview.
It’s best to just let those domains return like a 504 Internal Server Error and die a quiet death.