Article on professional troll farms on facebook and how they spew misinformation into your timeline even if you don't follow their pages because Facebook's algorithm appears to be optimized for evil.
Pull quote:
"Troll farms—professionalized groups that work in a coordinated fashion
to post provocative content, often propaganda, to social networks—were
still building massive audiences by running networks of Facebook pages.
Their content was reaching 140 million US users per month—75% of whom
had never followed any of the pages. They were seeing the content
because Facebook’s content-recommendation system had pushed it into
their news feeds."
--r