From Zero Hedge, summarizing the latest revelation from Edward Snowden by way of Glenn Greenwald(2/24/2014; emphasis is mine):
In the annals of internet conspiracy theories, none is more pervasive than the one speculating paid government plants infiltrate websites, social network sites, and comment sections with an intent to sow discord, troll, and generally manipulate, deceive and destroy reputations. Guess what: it was all true.
And this time we have a pretty slideshow of formerly confidential data prepared by the UK NSA equivalent, the GCHQ, to confirm it, and Edward Snowden to thank for disclosing it. The messenger in this case is Glenn Greenwald, who has released the data in an article in his new website, firstlook.org, which he summarizes as follows: "by publishing these stories one by one, our NBC reporting highlighted some of the key, discrete revelations: the monitoring of YouTube and Blogger, the targeting of Anonymous with the very same DDoS attacks they accuse “hacktivists” of using, the use of “honey traps” (luring people into compromising situations using sex) and destructive viruses. But, here, I want to focus and elaborate on the overarching point revealed by all of these documents: namely, that these agencies are attempting to control, infiltrate, manipulate, and warp online discourse, and in doing so, are compromising the integrity of the internet itself." Call it Stasi for "Generation Internet."
Greenwald's latest revelation focuses on GCHQ’s previously secret unit, the JTRIG (Joint Threat Research Intelligence Group).
Among the core self-identified purposes of JTRIG are two tactics: (1) to inject all sorts of false material onto the internet in order to destroy the reputation of its targets; and (2) to use social sciences and other techniques to manipulate online discourse and activism to generate outcomes it considers desirable. To see how extremist these programs are, just consider the tactics they boast of using to achieve those ends: “false flag operations” (posting material to the internet and falsely attributing it to someone else), fake victim blog posts (pretending to be a victim of the individual whose reputation they want to destroy), and posting “negative information” on various forums.
For more and for pretty Powerpoint presentation, go to Zero Hedge.