https://arstechnica.com/tech-policy/2019/10/eu-nations-can-force-facebook-to-remove-content-worldwide-court-rules/

Europe's highest court issued a controversial ruling Thursday with the potential to have staggeringly large implications worldwide. The Court of Justice of the European Union held that Facebook and other social platforms are not only obligated to proactively identify unlawful content but also to block it worldwide if a single country's authorities demand it.

The ruling (PDF) stems from a case that began in Austria three years ago. A Facebook user posted comments about an Austrian politician, Eva Glawischnig-Piesczek, that Austrian courts found to be illegally defamatory. Glawischnig-Piesczek in 2016 wrote to Facebook Ireland, the company's EU headquarters, asking the company to delete the comments and limit access to them globally. Facebook refused, Glawischnig-Piesczek sued, and the results of the years of legal wrangling are out today.