People attend a rally in support of President Donald Trump in Washington. AP Photo/Jose Luis Magana Misinformation about US election fraud fell 73% after President Trump was banned or restricted on social media. Zignal Labs said conversations fell from from 2.5 million mentions to 688,000 across social media, in research cited by The Washington Post. Trump has peddled baseless claims that the US election was rigged thanks to mail ballots, and that he "won big." Visit Business Insider's homepage for more stories. Online misinformation about the US election fell by as much as 73% in the week after President Trump was booted from Twitter and other social media sites.According to findings by Zignal Labs, and reported by the Washington Post, conversations about election fraud fell from 2.5 million mentions to 688,000 across several social media sites.The data indicates that tech platforms' ability to restrict the spread falsehoods is an effective approach to containing misinformation online.Zignal monitored social media sites for misinformation during the seven days from January 9.