Manufacturing Electronic Sales Corporation (MESC) of Santa Clara weren't too pleased when former IT manager Mark Erfurt, 39, from Orange County, southern California did a revenge hack into their systems. Erfurt has confessed to unauthorized access and recklessly damaging of MESC computer systems, and has also confessed to obstructing justice over his attempts to destroy evidence of his cyber crimes.

Erfurt admitted he hacked into MESC's systems using the systems of a competitor, Centaur, who were employing him at the time and where he continues to work. Centaur Chief Executive Officer Bruce Cahill told IDG: "This was a private individual that happened to use a computer system at our office. We're not involved in this."