[Tricky to implement. DOES NOT TRY TO AUTOMATE DETECTION OF FAKE NEWS. Relies on crowdsourcing for that.]
You score points in this game if you're quick to 'smell the rat' in stories that are eventually consensus-rejected as fake.
The implementation may be complicated, though, if we try to automate verification of how the story spread, comparing changes in text over time across every possible news site including blogs and facebook and twitter and local news.
Players will submit links that appear to include new variants to any story; the gamesite will archive the coverage and try to verify its own date-claims (watching especially for faked dating).
A group might try to swing a false consensus, but since registration will be required maybe the system could detect and fork such efforts. (If people always vote the same way you're given the choice of accepting or rejecting their votes.)
