Boing Boing carries a story on how Glamorgan Uni found a load of secrets on people's apparently clean hard drives. In a research project, the uni bought a load of second hand PCs and here's what happened:
"..more than half still contained personal information. This included national insurance numbers, evidence of a married woman’s affair and detailed biographical information about children.
Ninety-seven of the hard drives were bought on eBay and four at car boot sales. As a control experiment, ten drives were also sourced from LCS Remploy, a company specialising in the destruction of data. All proved to be clean."
Nice PR for LCS Remploy too then!