After Missouri's branch of the Ku Klux Klan declared last week it would "use lethal force as provided under Missouri law to defend ourselves" against Ferguson protesters, one group apparently made the KKK pay.

"You have awakened a sleeping giant," the KKK flier also said. "The good people of St. Louis County of all races, colors and creeds will not tolerate your threats of violence against our police officers, their families and our communities."

Image source: KKK via Riverfront Times

The group that took exception to the KKK flier? The notorious hacker collective widely known as Anonymous — and the group immediately went to work, announcing Operation KKK (#OpKKK) designed to harass the white supremacist group, Raw Story reported.

Anonymous posted St. Louis-area KKK members' photos and personal data on Twitter, including addresses and jobs, Raw Story said. But the KKK was unimpressed and mocked Anonymous on Twitter, calling them "wannabes" and "cowards" and saying the group would never take action against them.

We are continuing to read Anonymous threats with much amusement. Still no action taken. #Cowards #HoodsON

— Ku Klux Klan (@KuKluxKlanUSA) November 16, 2014

But by Sunday Anonymous had taken action, reportedly hacking into the KKK's Twitter account and taking it over, Raw Story said. The group even swapped out the KKK logo for an Anonymous logo and wrote prominently: “Under anon control as of 16 NOV 2014 09:11:47. You should’ve expected us.”

Image source: Twitter

Anonymous' first tweet as the new controllers of the KKK Twitter account featured a photo of a lynched Klansman. (Content warning: The image may be disturbing to some readers):

16 NOV 2014 09:11:47 You should've expected us. #OpKKK continues to be a success. Freedom will prevail. pic.twitter.com/FUrNzBpVOa

— Ku Klux Klan (@KuKluxKlanUSA) November 16, 2014

A statement from Anonymous about the seizing of the KKK Twitter account is scheduled for Monday.

This story has been updated.

(H/T: The Gateway Pundit)