I understand your position, but the judge is probably going to answer that it's not a bar owner's job to decide which laws are good enough to be respected.
Due to the cost and risk involved, few cases go to jury trial... BUT if it's anything like the US a jury technically could consider things like this and refuse to render a guilty verdict.
In France, if I recall, isn't it usually a panel of judges? I don't think they use a jury.
Quick perusal indicates Cour d'assises is the only court with a jury analog, and it only deals with matters where the penalty would result in a >10 year sentence if I'm reading it correctly.
