Pace - you know I also have every sympathy, but as with MJ, sympathy matters not one wit in the land in of the Euro (and £). I guess any of them could be grounded / uninsured IF they get caught, and IF the authorities decide to do something about it. You might "win" but at a cost and with a lot of hassle - the usual way it works!
In the UK you can fill up your yacht with pink diesel, the UK is acting outside EU remit, sail to Belgium and you can be impounded / heavily fined AND they have actually done so in a few well published cases. The RYA has gone some way to sorting out the mess - but it is still a mess.
For the same reason if you get "caught" or have an accident you (and any of the rest) could face all sorts of hassle. Of course most rely on it never happening and usually it doesnt.