Activist hacking group Anonymous have declared this Friday, December 11, a "trolling day" against the so-called terrorist group Islamic State (ISIS) as part of its cyber campaign against the militant Islamist group.

In an online message, Anonymous asked people to mock ISIS, or "Daesh" as it is also known in the West (a derogatory term for the group) online as part of its "Operation ISIS" campaign.

"We ask you to show your support and help against ISIS by joining us and trolling them // do not think you have to be part of Anonymous, anyone can do this and does not require special skills."

"We ask you to take part of this on Facebook // Twitter // Instagram // Youtube //In the "Real World," the post on file-sharing website Ghostbin added.