From September 1, anyone who owns a .ru domain, the country-code address for Russia, will have to prove their identity through a Russian government system or lose the name. The rule covers both new registrations and the roughly six million domains already in use, and it lands hardest on the owners least able to comply: foreign businesses and individuals who cannot, or will not, hand their identity documents to the Russian state. It is a blunt reminder of something that is easy to forget when you...