In the last 15 years the web has steadily become more open and transparent. But beyond Google, Facebook and Twitter lies the hidden networks of the deep web where anonymity is the foundation for all interactions and no rules can be enforced. So how does the hidden underworld of the internet impact the rest of the net and our societies? Can, and should, we try to control and regulate the deep web? Or do these obscure networks fill legitimate needs in today’s world?