(re the French) At the time apparently 63% were in favour of compulsion. Still there were objections as in the UK and the scheme has been delayed if not cancelled.
The cost of forcing the 37% to acquire and then carry the card is what kills the scheme. The UK government haven't quite grasped this point yet, that it doesn't actually take that many to refuse outright or to play the system for maximum cost and the price goes way up.
Easy starting point: when they're compulsory, there will be a period over which you're supposed to go get fingerprinted, etc. So make an appointment, then the day before, get a nail file and file your fingerprints smooth. Add some scratches for good measure. Chances are you'll have to return on another day, having wasted some of their time. Next time, pick up something a bit too hot and damage your finger tips so they can't get a decent print this time either. Third time, turn up the day after doing decorating, with bits of paint all over your finger tips. Choose a paint that doesn't scrub off easily. Cancel the odd one at the last minute to take the budgie to the vet or a child to the doctor. Get called away on an urgent business trip. You can probably drag it out several months and many appointments. Multiply that cost and delay by all the other awkward bu66ers doing the same thing.
Once it's compulsory to carry them and you've run out of excuses for the above, be one of the million who refuse to carry ID. Stopped by the police, spend a few minutes searching your wallet and offer to accompany him to the station to fill out the paperwork. They'll have to stop asking for ID, because they'll all be back at the station filing paperwork for everyone who isn't carrying it.