Great infographic by State of the Internet which raises an interesting question, should websites block Tor users? Certainly one for debate, my view is it depends on your website 'marketplace', function and risk, in other words perform a risk assessment, a lazy answer I know.
But if like me you find yourself often explaining what Tor is to business folk, so they can perform those risk assessments properly, you'll find this infographic comes in quite handy. As it does a simple job of explaining Tor; who uses it, how it provides anonymity online, and how cyber criminals are embracing the tool for various illicit purposes.
I recommend checking out the State of the Internet website for further info, statistics and reports on Web and DDoS attacks, which continue to blight the Internet.