“We are running a small test which shows the text ‘[Satire]’ in front of links to satirical articles in the related articles unit in News Feed,” a Facebook spokesman tells BBC News. “This is because we received feedback that people wanted a clearer way to distinguish satirical articles from others in these units.”
We’ve not seen any satire posts tagged that way, so we’re not sure how widespread the test is. Another issue is whether Facebook would base its satire tag on the overall content of a site or if it could be author-specific.
For example, Andy Borowitz’s contributions to The New Yorker often pop up in my Facebook newsfeed from both people who understand it is satire and from people who think it’s genuine news.
Google News has been tagging The Onion and other humor sites that pop up in search results as satire for quite some time.