On Monday, February 6th, Chris Hedges posted an article on the web entitled, "The Cancer in Occupy", in which he roundly criticized the Black Bloc as being a threat to the Occupy movement. His article has since stirred up a lot of discussion in the activist community, particularly in Oakland.
In this KPFA program entitled, "Letters and Politics", the program host Mitch Jeserich has invited a discussion between Hedges and an activist from Occupy Oakland, Kristof Lopaur, to discuss the issues related to the Black Bloc. The discussion starts at about 5 minutes and continues until 56 minutes into the program. I also recommend that you read the comments following the progam.