Margaret Sullivan: When Facebook and Google are 'weaponized,' the victim is reality

Well-intentioned warnings to journalists were circulating early this week as the news of the Las Vegas massacre broke.The Society of Professional Journalists urged accuracy, fairness and respect.Poynter Institute cautioned reporters to avoid speculating on mental illness and told editors not to use images that glorify the shooter.But the purveyors of viral lies weren’t listening to this good advice, and never will.Facebook and Google served up disinformation on their all-powerful platforms