“I’ve expressed how upset I am that the Russians tried to use our tools to sow mistrust,” he said. “What they did is wrong and we are not going to stand for it. For those who have followed Facebook you know that when we set our minds to something, we’re going to do it.”

Source: Zuckerberg Is ‘Dead Serious’ About Russia, Open to Legislation – Bloomberg

Unfortunately, as documented on this blog, there is extensive creation and distribution of fake news and related propaganda from people in the United States.

The root problem is that share-able social media is a friction-less platform for the spread of propaganda messaging. No one has identified an effective solution to corral this serious problem.