Thanks for your thorough reply, appreciated. I will keep it short though. I can't speak for the German case, but I am sure about the Dutch one. However, if you

Thanks for your thorough reply, appreciated. I will keep it short though. I can't speak for the German case, but I am sure about the Dutch one. However, if your demonstration is a threat to the public order ( health, traffic etc ) you are (criminally) responsible. But this is always the case, demonstration or no demonstration. So I will repeat, in NL there is no requirement to register your protest with the authorities.