Need To Know News 19-03-19 Original post Cached copy Devin Nunes Sues Twitter for $250 Million Shadow Banning Him. He Is Also Suing Several Twitter Trolls for Smearing Him Need To Know News - 2019-03-19 - Original post - Cached copy Federal law exempts services like Twitter from defamation liability, but because the site censors and bans content, it should be considered to be a content developer/ publisher and face liability like any other publisher.