Scenario: Reputable news site 'A' posts a story about fake news site 'B' that includes a link to site B. Google sees site A linking to site B and improves the TrustRank of site B.
A hundred other good news sites also post stories about how abominably bad site B is, and pretty quick site B is ranked the most trustworthy site in the world.
Without any context sensitivity, TrustRank can be a dangerous thing.
Slashdot Mirror
Scenario: Reputable news site 'A' posts a story about fake news site 'B' that includes a link to site B. Google sees site A linking to site B and improves the TrustRank of site B.
A hundred other good news sites also post stories about how abominably bad site B is, and pretty quick site B is ranked the most trustworthy site in the world.
Without any context sensitivity, TrustRank can be a dangerous thing.