My understanding is that as a foreign visitor, with a sub-250 gram drone, all you need to do is register yourself (not the drone). You register in the first EU country that you intend to visit, and then you are good for all EU nations after that, since the initial registration is recognized as valid for all EU countries.
For example, let's say I plan to visit Ireland first (great music, great beer, beautiful scenery, lovely people, English widely spoken), so I register (myself) there. But then my plans change -- I decide to skip Ireland, and go somewhere else in the EU, let's say Portugal. Any issues with not first flying in Ireland, and just going somewhere else?
In other words, are there any "teeth" to the instructions that say, register in the first EU country you will visit? Or can you simply pick any EU country to register in, and then go about your visit and fly in any EU country?
Asking for a friend. Thanks.