The three authors make the recommendation that, to deter fake/unapproved information from being circulated, the US should amend the US Constitution:

"Under US law, adapt the First Amendment, perhaps by building upon existing hate speech prohibitions that are permitted by the First Amendment, such as the federal cyberstalking statute (18 USC § 2261A); create exceptions and add possible new regulations to Section 230 of the Communications Decency Act of 1996, a provision that shields social media platforms from legal liability for the actions of third-party users of their services; and amend and evolve electoral regulation."

really fascinating video linked there