A protester wearing a mask take part in a demonstration against ACTA (Anti-Counterfeiting Trade Agreement) in Vienna, February 25, 2012. Protesters fear that ACTA, which aims to cut trademark theft and other online piracy, will curtail freedom of expression, curb their freedom to download movies and music for free and encourage Internet surveillance. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST)