A U.S. senator has written an open letter to Valve boss Gabe Newell asking for more stringent moderation of Steam. Mark Warner, the United States senator from Virginia, demanded Valve crack down on what he called “hateful accounts and rhetoric proliferating on Steam.

Sen. Mark Warner says lax enforcement of rules by social media platforms ‘leads to toxic social environments that elevate harassment and abuse.’

U.S. Sen. Mark R. Warner (D-VA) today urged leadership at Valve, a prominent video game company, to respond to reports that their gaming distribution and social networking platform, Steam, is hosting extremist and hateful content – including over 1.