I produce things for tv & the web. Founder & Chief Creative Officer of http://AuraNexus.com (@auranexus). Former Head of Live Video @ BF News 
andrew.kimmel@gmail.com
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Users celebrate violence... Former users report that exposure to language, memes, & videos on the site desensitized them to hateful language/bloodshed, even offline. Attacks by individuals w/ extreme ideologies similar to those featured prominently on 4chan are rising in the U.S.
In the last 5 years, terrorist attacks by far-right attackers has nearly tripled. And perpetrators of recent far-right terrorist attacks in Christchurch, NZ, & Poway, CA, posted about their plans on 8chan, a more vitriolic offshoot of 4chan, where other users encouraged them.
