Every now and again, the Internet gets all flustered about the latest hack attack by the mysterious group known as Anonymous.

The media reports it, online communities take sides, but it's hard to get a handle on exactly what Anon is, and where their ultimate agenda lies. How do they pick their targets? Who's in charge? Can anyone join?

In an effort the alleviate some of these burning questions, our friend Jeremiah Warren put together this explainer video that dissects the origins of the hacker collective and their increasing blip on the radar of law enforcement and public attention.

Where do you stand? Does Anonymous fight for a free and open Internet, or are they destructive hacker trolls? Have your say in the comments below.