that police tracked mafia boss Pasquale "Scarface" Manfredi, 33, was tracked by police because the boss of the 'Ndrangheta mafia organization of Calabria in Southern Italy logged onto the social networking site so often that they could trace his internet connection back to his hideout.

Manfredi is accused of at least 20 crimes and a number of killings, including the 2004 massacre of a rival clan leader in which he blew up the leader's armored car with a bazooka. According to Crotone police chief Angelo Morabito, "He is without a shadow of doubt the most dangerous criminal of the province of Crotone."

So, perhaps the recent news that the sites such as Facebook, MySpace, and Twitter, is good news. This is not the first time that a criminal's love of social networking has been their undoing, after all--here are four more criminals who might have remained anonymous, had it not been for their love of the Net.

Eighteen-year-old Heather Ann Tucci was the driver of a car that was involved in an accident that resulted in the deaths of two teenage boys on August 19, 2006. She pled "not guilty" to two counts of vehicular manslaughter, and then posted the following to her MySpace page: