Online hackers have successfully stolen more than two million passwords from the biggest social media sites, including Facebook, Twitter and LinkedIn. The details were then posted online, and although victims were spread across the globe, it is claimed by investigators that the majority of these users were based in the Netherlands. The crime was uncovered when a team of probing a botnet known as ‘Pony’ stumbled across the mass of compromised data. A botnet is a network of hacked computers set up by criminal gangs to enable them to share information and perform a variety of illegal activities.…