> However, there's a loophole that's apparently becoming popular: "ghost plates".

We don't call fake IDs either a loophole or "ghost IDs". When presented as identity documents, they're fraudulent identity documents. It doesn't matter if that ID is being presented to a bouncer in order to get in to a bar, or to everyone who cares to look at your car's bumper while it drives down the motorway, it's still a fake ID.