"The FIA World Motor Sport Council also considered the report of the FIA Formula One Technical Delegate in respect of the electronic systems used on car #5 (Michael Schumacher) at the 1994 San Marino Grand Prix.
After hearing the representatives of Benetton Formula Ltd., the World Motor Sport Council reached the conclusion that, in common with the other two teams, Benetton's computer system contained a facility capable of breaching the regulations. In the absence of any evidence that the device was used and certain evidence that it was not, the World Council imposed no penalty involving the results of the event.
The World Council imposed a fine of 100,000 US$ on Benetton Formula Ltd for failing to make their computer source codes available immediately. An identical fine was imposed on McLaren for the same reason subject to McLaren's right to demand a hearing in October.
Paris, 26 July 1994"
http://www.motorsport.com/news/article.asp?ID=627&FS=F1
On what basis would justice have been served by punishing teams for not using an illegal system?