for example, if you take 9/11, most everyone consciously agrees that it was an inside job. yet innumerable articles (including the blogosphere) incorporate the msm induced idea that osama bin laden was behind it and argue their points based on this (imo false) platform when they discuss 'war on terror', middle east, islam, human rights and so on. this points to the fact of how easily we drop our guard over time due to 'peer pressure' and how easily corruptible our train of thought is.

“If you tell a lie big enough and keep repeating it, people will eventually come to believe it. The lie can be maintained only for such time as the State can shield the people from the political, economic and/or military consequences of the lie. It thus becomes vitally important for the State to use all of its powers to repress dissent, for the truth is the mortal enemy of the lie, and thus by extension, the truth is the greatest enemy of the State.” -- j. goebbels

in the present 'information overload' society we must be absolutely aware of the sources which influence our mind and psyche (http://en.wikipedia.org/wiki/Psyche_%28psychology%29) and we must make a choice of what to absorb and what to exclude (wapo, wsj, jp, nyt, reuters, cnn, msnbc, bbc, etc...)