Nick_Ch7_Sack_Q

I really, really dig Warren Sack's theories on very large scale conversations. It is such an interesting theory, which seemingly combines a number of different organization structures into concise way to track larger community discussions. I found a couple of updated articles on the subject by Sack and are interested to see how he addresses how the internet has changed in the last 5 years. For instance, if he has a way to incorporate blogs and large community sites, such as myspace.com or facebook.com.

Either way past this, my actual question is...does all this organization, filtering and narrowing of information cut down the possibility of random exposure to information that goes against a persons belief? Does this just bring out only information which confirms people's current beliefs?