This is down to the ease with which even a beginner can trace past generations, thanks to registers of births, marriages and deaths from 1837, census results from 1871 and parish records among the resources available online.

BBC: NEWS | UK | Magazine | 'My ancestors got hitched in this church'

Using a hacker currency like Bitcoin, software designed to cloak online actions in anonymity, and enough willing participants, this black market can be recreated with relative ease if Silk Road is ever taken down.

FORBES: How Technology Complicates The War On Drugs: Guns And Drugs For Sale Online