I've heard that Georges Duboeuf, the Pope of Beaujolais, has been accused of fraud. His finest cru (apx 20 Euro) seemed to be mixed with cheaper beaujolais (apx 5 Euro).
With sales of 300,000 bottles this means an extra profit of 3-4 Mio Euro...
According Duboeuf it was caused by human failure. Yeah, right...
Fact; 100,000 hl beaujolais has been distilled to industrial acohol last year.