Gleaning truth from a forum is an art.
Over 90% of what I read on forums is either incorrect, inaccurate, or a company pushing their products ever so discretely. The company moles are the ones who try to get the "lemmings" marching in a certain direction. Once they get them going on their path, they have to periodically add product reinforcement posts to get them over the cliff (i.e., buy their product).
I work for a computer company and have been thinking about creating multiple screen names and "discretely" push my company's products on the computer forums.
Of course, pushing a product without making the readers suspicious, is also an art. If my company offered to pay me per post, and added a bonus if I was clever in my methodology, I might be tempted.
However, I think the Internet will eventually render itself irrelevant once enough people realize how much misinformation it is spreading.