The hacker/activist group called Anonymous have supposedly taken down hundreds (200 to be exact) twitter accounts. Anonymous announced the second phase of the mission to avenge all the deaths during the shooting at Charlie Hebdo.
Anonymous had this to say:
“It is our responsibility to react. Anonymous has always fought for the freedom of speech and freedom of the press. We will never stop. Anonymous must remind every citizen that the freedom of the press is fundamental to all democracy. It is everyone’s responsibility to defend it. Any organisations or enterprises linked to those terrorists attacks should expect a massive reaction from Anonymous. We are tracking you down. We will find you and not leave you any rest.”