IBM says Block Tor

http://public.dhe.ibm.com/common/ssi/ecm/wg/en/wgl03086usen/WGL03086USEN.PDF IBM Advises Businesses To Block Tor With Tor-based attacks on the rise, IBM says it's time to stop Tor in the enterprise. New data from IBM's X-Force research team shows steady increase in SQL injection and distributed denial-of-service attacks as well as vulnerability reconnaissance activity via the Tor anonymizing service.