Protesters wearing Guy Fawkes masks, made popular by the graphic novel "V for Vendetta", take part in a demonstration against ACTA (Anti-Counterfeiting Trade Agreement) in Vienna, February 25, 2012. Protesters fear that ACTA 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 TPX IMAGES OF THE DAY)