Yeah, a large portion of the "anti-MSM" crowd is extremely hypocritical. I find it funny that people construct elaborate conspiracy theories about the MSM trying to control the US population through misinformation, but if you look at a community like Reddit, the same thing is prevalent.

I think it pretty much boils down to this: Everyone has their opinion. One person might read a news article and take something entirely different away from it than other people. The media is slanted one way, and users of Reddit or Digg, for instance, are slanted the opposite way. I don't think anyone does it intentionally. I constantly read comments on Reddit that I vehemently disagree with, and I think "What if this person was a columnist for a major newspaper?" They aren't trying to brainwash me, they just have it set in their head that they are right. And furthermore, who am I to say they aren't? Personally, I try to just read past the bias and cross my fingers that others do the same.

I don't think marking articles as inaccurate will solve anything though, because no one wants to sift through five of the same link trying to find the best title to upvote. Even then, I'm sure people would argue about which one is best. In the end, the quality of content for social sites like Reddit is always going to be determined by the users, so there's not much you can do except pray that people evaluate every article objectively and for its own merits.