Flavio Briatore said himself that he's not a Formula 1 fan. He's a businessman and F1 is, or better was, his business. The last trick he's pulled was his worst and his last one in Formula 1. And it was one too many. It ruined his name for good.
The first cheating tricks surfaced in 1994 when he won the title with Michael Schumacher and Benetton. Under Briatore's management, the Team removed a fuel filter to save time during pit stops, Schumacher was told to ignore the Black Flag during a race, the wooden board under the car was undersize and they allegedly had a traction control which was not allowed at the time.
Benetton claimed they had a verbal agreement with FIA’s technical observer Charlie Whiting. Why on earth would he AGREE to let them have an unfair advantage?