@Anonymous Coward, re. smoking
"How many people have been caught smoking and yet the observance of the law is close to 100%."
The difference is that most people are actually in favour of the smoking ban, whereas great numbers of people will see this as a draconian over-reaction that somehow managed to be shoved onto the statute books, making a mockery of the democratic process to boot. I would probably ask someone to stop smoking next to me in a pub or restaurant, unless they looked like a complete psychopath, but I'd cheerfully help and encourage people to find ways round this law, make it difficult to enforce, and generally be disruptive until it was repealed. If I lived in France, of course.