What you describe is chain-of-trust model and is very slippery slope. Twitter uses similar model (less emphasis on content, more emphasis on who says it). The r

What you describe is chain-of-trust model and is very slippery slope. Twitter uses similar model (less emphasis on content, more emphasis on who says it). The result is that when a famous person tweets that he sneezed in the morning, that tweet will get thousand likes and probaby get viral. On the other hand, some nameless person tweets that he found astroid that will hit earth in next 10 hours, no one will notice. In my opinion, one the biggest short term application of AI/NLP would be to rank-by-content and moving away from variants of page-rank.