Sorry I don't have a link, but a couple years ago, a guy apologized on godlikeproductions and Abovetopsecret.com and some other sites, stating he had been posting on their sites for a while under various fake names for a company that was paid to manipulate online comments and forums. He joined this company that would frequently change their name from one innocuous name, like TechInternational, or something, to another and moved from one anonymous office to another. There, he was handed a binder of arguments and counterarguments that dealt with one subject or another. His first account, for example, was Israel. He didn't know anything about it-he was sort of apolitical, but he learned a lot doing the job and mastered the discourse well enough to be promoted to other accounts. He would read comments, post counter-arguments and manipulative comments to guide the conversation and put out the propaganda. He apologized for his work, having become politically aware in the process of diverting the conversations online. Fascinating reading.
