If FB starts fact-checking political ads, that to me would be one step closer to Facebook being a 'publisher' rather a 'platform', which would open Facebook up to a world of litigation when something nefarious or disagreeable slips through the cracks to the public. And of course, after political ads, what's next? Should they limit certain dietary advice if the purported results are not sufficiently substantiated?<p>Another question would be - how are the 'lies' to be limited? Are the posts hidden, or marked with a "fake news" indicator? What if 80% of the content in an ad is true but the other 20% is unsubstantiated? Does that get tagged as well? "Partial fake news"? If Facebook implemented something like this, would they be open and transparent about how their site goes about verifying claims in ads so that the users can go straight to the source(s)?<p>With all of Facebook's missteps and mistakes in the past, who really wants them to be the arbiter of truth? Would people even trust them to be the arbiter of truth? Or would Facebook's efforts to mitigate or limit certain ads embolden the political side represented by that ad? (Not to generalize, but there are certainly some out there who are immediately dismissive of claims of truth when they come from Fox News/CNN, depending on their political persuasion).<p>It would seem more logical to me for Facebook to fund and coordinate some kind of 'awareness' campaign on the site in which it guides its users as to the level of skepticism to maintain when seeing political ads and how to go about verifying the veracity of claims in political ads they might see.