Promoter Top Rank, which represents Manny Pacquiao, says it plans to pursue legal action over streams of the Mayweather-Pacquiao fight that surfaced online over the weekend, writes Eriq Gardner at The Hollywood Reporter. HBO and Showtime could sue as well. But if Twitter is named as a defendant, the microblogging service would be “the favorite in the legal ring,” thanks to the Digital Millennium Copyright Act, which protects Web services from liability when users post infringing material.