Here's a problem with spammers on tweeters. Suppose you're doing a diffusion of info study, and you want to track RTs and even the memes over a network chain. Trouble is, some worthy folks (like someone who begins with @z) just let all Followers in, even though I betcha most are now spammers who never check Your posts (Narcissim, thy name is Twitter Spammers). So any chain of communication is going to end with them as black holes, and we're going to get quant underestimates of the extent to which memes propogate on Twitter. Barry Wellman _______________________________________________________________________ S.D. Clark Professor of Sociology, FRSC NetLab Director Department of Sociology 725 Spadina Avenue, Room 388 University of Toronto Toronto Canada M5S 2J4 twitter:barrywellman http://www.chass.utoronto.ca/~wellman fax:+1-416-978-3963 Updating history: http://chass.utoronto.ca/oldnew/cybertimes.php _______________________________________________________________________