(March 4, 2019, 2:22 PM EST) -- SAN FRANCISCO — Facebook Inc. and Instagram LLC on March 1filed a trademark infringement and cybersquatting complaint in California federal court against several Chinese companies and individuals that they say are falsely offering to sell fake user profiles to their respective social networks (Facebook Inc., et al. v. 9 Xiu Network [Shenzhen] Technology Co. Ltd., et al., No. 3:19-cv-01167, N.D. Calif.)....