A study confirms that some communities of 4chan and Reddit influenced Twitter. Part of the conspiracy theories and fake news broadcasted on the social network originate from users of these two platforms.
Some fake news and other conspiracy theories often arrive on Twitter from the same sources: close-knit communities active on popular 4Chan and Reddit chat rooms, which prepare their hoaxes and rumours before spreading them on larger audience platforms like the mainstream social networks.
See more at : http://www.numerama.com/tech/302987-fake-news-et-complot-linfluence-de-reddit-et-4chan-se-ressent-sur-twitter.html