Via Ars Technica:
In January, a French court ruled that Twitter must hand over the details of people who had tweeted racist and anti-semitic remarks, and set up a system that would alert the police to any further such posts as they happen. Twitter has ignored that ruling, and now the Union of French Jewish Students (UEJF) is suing it for €38.5 million ($49.96 million) for its failure.
The case revolves around a hashtag—#unbonjuif (“a good Jew”)—which became the third-most popular on the site in October 2012. The UEJF took Twitter to court, demanding that those who had tweeted anti-semitic remarks using the hashtag be named by Twitter so the police could prosecute them for hate speech.
Twitter refused, arguing it was based in the United States and thus protected by the First Amendment’s freedom of speech guarantees.