Wired has a great article reliving the 2007 scandal in Formula One where engineers allegedly stole information from Ferrari and gave it to McLaren.
If you enjoy F1 (or tales of industrial espionage) it's a great read.
A few days later, Trudy Coughlan picked up the two CDs, along with the 780 pages of documents. Following her husband's instructions, she destroyed the papers in a home shredder and burned the remains in their back garden. Thus began the biggest scandal ever to rock the world of Formula One racing.