The Italian 1990’s Tute Bianche (White Overalls) have developed ‘Violent Non-violence’ as an alternative to Black Bloc tactics #oo
http://books.google.com/books?id=IJpYlFC1lKUC&lpg=PA57&dq=Zapatista%20’Black%20Bloc’&pg=PA57#v=onepage&q&f=false