The Supreme Court is hearing arguments in a Texas case that could have major ramifications across the country—including, perhaps, the end of anonymity online.A Texas law requiring people to provide proof of age before viewing online porn comes before the U.S. Supreme Court today. With similar laws already at play in 18 states besides Texas, and other states considering such measures, it's fair to say that the future of online porn in this country depends on what the justices decide in this case. The Texas law (House Bill 1181) is being challenged by multiple plaintiffs, including the Free Speech...