Tinted number plates

Back in the late 80's people would buy a new car in November/December and drive around in it with "For Reg" as the number plate until January when they would register the car, thus getting them a car cheaper because dealers gave better deals at year end. This was eventually clamped down on.

saw a 231 BMW SUV - WHITE with no plate with just black 231 C xxx - no euro or county name - it looked really well on a white car but obviously totally illegal and dont approve

Just curious if there is anything like this outside of Ireland. I'm sure it happens in countries lower down on the development index, but for sake of argument, has anyone ever seen unapproved number plates in another OECD country?

I know I'm more likely to see this sort of thing in Ireland as I live here, but I've travelled a reasonable bit and never seen modified plates in any other country. The closest I've seen is personalised "cherished" plates in the UK, but they're still legal, and conform to the law on size, font, colour, etc.

Ireland seems to be a free-for-all... grey-tinted plates, yellow plates (a Donegal and Monaghan specialty), and squirly unreadable fancy handwriting fonts.

They don’t look as bad on the Dutch plates for some reason, think the font is different or they don’t have the letters as thick as you see here.

Where do people get these tinted plates in the first place.

Seen a good few black on dark grey plates that are barely legible, a sign of the increasingly lawlessness on the road.

I travel the M50 every weekday for work, and the amount of trailers with no registration plate, or one not matching the cab is getting more and more common. It's like the drivers don't care, as the chances of being pulled over are probably zero.