Social and social sites are often harmful. Sen. Richard Blumenthal told the Journal Facebook seems to be taking a page from the textbook of Big Tobacco — targeting teens with potentially dangerous products while masking the science in public U.S. Rep. Ken Buck, a Republican, tweeted Big Tech has become the new Big Tabacco. Facebook is lying about how their product harms teens. The series matters because it comes with evidence. Time and again, the documents show, Facebook researchers have identified the platform's ill effects, the Journal shows Time and again, despite congressional hearings, its own pledges and numerous media expos, the company didn't fix them. The documents offer perhaps the clearest picture so far of how broadly Facebook's problems are actually known inside the company, up to CEO themselves.