I have done zero research in depth on this, but one of the first (easy) things I would look at is the whois on the domains that are producing news. If they're

I have done zero research in depth on this, but one of the first (easy) things I would look at is the whois on the domains that are producing news. If they're hidden behind a proxy identity, probably unreliable. Also what about providing an inexpensive way to "verify" those whois credentials? Pay $5 and we'll send you a letter in the mail and you confirm you're the owner of the domain in question.