“GOALLLLLLLL,” Lionel Messi! First came the Vine recap. Then came the takedown notice. There exists no better method in 2014 to quickly slice up and share online a moment of World Cup glory than the mobile app Vine — and it turns out, no faster way to earn yourself a legal threat from a media conglomerate that happens to own the rights to that sports moment. Vine is the Twitter-owned social networking service launched last year that gives users a handy toolkit for chopping up video into digestible 6-second loops that are as easily disseminated as tweets and even easier to capture, upload, and view than any competing service. For sports junkies and news websites, Vine has been a godsend allowing the lightning-fast creation of highlights readymade to go viral. Related stories World Cup first to break 1 billion interactions on Facebook How to stream the World Cup At World Cup, goal-line tech causes controversy For World Cup, ESPN goes big and goes online But Vine’s ubiquity also raises new and difficult questions about the extent of fair use protections in the digital era. That decades-old legal concept shields individuals and news organizations from a rights-holder’s claim of infringement. But…