Techcrunch comments could be a great launch pad for an anti-comment-troll API/service. Ultimately it does come down to trust networks. Couldn't pagerank methods

Techcrunch comments could be a great launch pad for an anti-comment-troll API/service. Ultimately it does come down to trust networks. Couldn't pagerank methods be applied to the 'trustworthiness' of commenters, and therefore people who consistently troll could be removed from the conversation entirely?