Any Experience With (france) Crit'air Stickers?

I've seen these... Easy to fit and easy to take off.
https://www.amazon.co.uk/Fixative-Teasy-Crit-Air-Franҫais/dp/B07BYYH69Y

 

Arrr....french red tape, love it

about 15 years ago was in a convoy of cars coming back from le mans 24 hr, 10 cars 5 brits, 5 dutch. Jolly little gendames pulled us all into the services. All 5 brits fined 80 euros all the dutch lads let go, they did buy us lunch at baie les somme (?spelling) so not so bad (the dutch not the gendames!)

 

They're not country wide and I tend to ride away from the main areas, so I just avoid the cities that use them when I go

 

I'd never even heard of these stickers.. I tend to avoid cities like the plague anyway, so never had any need for them.

 

I don't have one on my bike, like 99.9% of the riders there.
It's used in big cities, only during pollution peaks, and they point cars and it would be really really unlucky they spot a foreign tourist bike for that .

The few ones that put the crit air sticker are the one that commute in big cities.

I know in Germany this was put in place way before other countries.
A german friend gave me the black pirate one to put on my Volvo 240 Turbo