Pretty interesting. This Large Scale Study of Myspace (<a href="http:&#x2F;&#x2F;www.cc.gatech.edu&#x2F;projects&#x2F;doi&#x2F;Papers&#x2F;Caverlee_ICWSM_2008.pdf" rel="nofollow">http:&#x2F;&#x2F;www.cc.gatech.edu&#x2F;projects&#x2F;doi&#x2F;Papers&#x2F;Caverlee_ICWSM_...</a>) paper shows a similar method for finding characteristic terms, using Mutual Information.