Daniel_Stuckey writes "Scheduled to coincide with Guy Fawkes Night, a centuries-old day of remembrance typically celebrated in Great Britain, the Nov. 5 protest is something of a tradition for the hacktivist collective. Anonymous, which is often identified by the Fawkes mask used in the Hollywood blockbuster V for Vendetta, hosted a similar rally in 2011, dubbed 'Night of a Thousand Masks.' Protesters in Washington, D.C. clashed with police before noon. By approximately 10am, an arrest was made. The incident was livestreamed, and Anonymous claimed that the individual was grabbed and arrested after stepping off a sidewalk and into the street. A spokesperson for the D.C. Metropolitan Police Department declined to comment."