This is what I've been talking about. Not only do they turn demonstrations violent, there is an active, well organized, anarchist movement of hackers (black blocs) to take down Western banks and infrastructure...
The annual report by Germany's internal security agency lists industrial espionage and left-wing violence as the biggest threats to democracy in Germany. The report showed that the number of right-wing extremists had remained stable in 2009. http://www.dw-world.de/dw/article/0,,5714893,00.html?maca=en-newsletter_en_bulletin-2097-html-nl