@nopatience yes of course there should be ways to do it properly.

For example an org like BBC in this case could publish pubkeys for all their journalists, then each time a journalist publishes something the journalist signs it and whoever wants to quote that can do so in a way that allows readers (clients) to cryptographically check that the quote is indeed a verbatim quote from the claimed source, checking the signature and verifying the quoted text. That could be mostly automated I guess.