Facebook has gone down for thousands of users in the United States and Europe on Friday night, with some unable to access the site and others reporting that porn had flooded their video feeds. Downdetector.com which measures website problems saw the problems start to occur around 10pm EST. At least 4,800 users in the U.S. reported on Downdetector that they were unable to log in. The most common issue appeared to revolve around those attempting to log in to the site - which they were unable to do.