The second is that the websites cannot be held legally responsible for most of what their users post online, shielding the companies from lawsuits over libelous speech, extremist content and real-world harm linked to their platforms.Questions arose over how the social networks might have unduly affected elections, genocides, wars and political debates.While lawmakers in Washington have grilled the chief executives of the tech giants over the past three years about the content they take down, proposals to regulate harmful content haven’t gotten traction.For years, judges cited the law in dismissing claims against Facebook, Twitter and YouTube, ensuring that the companies did not take on new legal liability with each status update, post and viral video.In 2020, the court turned down a lawsuit, by the families of individuals killed in terrorist attacks, that said Facebook was responsible for promoting extremist content."