And so, the cyber war between Isis and Anonymous rages on. After shutting down over 5000 of the militant group's social media accounts, and publishing a handy “how to” hacking guide against them, Anonymous are well into the midst of their “biggest” ever terrorist takedown. The online activists are apparently more determined than ever to destroy Isis – and now, they may have just unleashed their most powerful weapon yet.

According to a recent tweet from the #OpParis account, Anonymous are now flooding all pro-Isis hashtags with “Rick Roll” videos. That means; whenever any Isis account tries to spread a message, or get something trending, the topic will instead be flooded with countless videos of Rick Astley circa 1987.

“Rickrolling”, the internet meme where you trick people into watching the Rick Astley classic “Never Gonna Give You Up”, was started on 4chan way back in 2007. It's been used in viruses, protests against Scientology and Internet tax, and on countless lolz April fool's days videos. If you're a hacker with a penchant for the past, it's the obvious choice.

For those of you that don't remember the meme, don't worry. I don't blame you. It's easily over eight years old – which, in internet time, basically means it's prehistoric. It probably stopped being funny around that time too. But oh well. Just appreciate the effort, everyone.