On January 4th or shortly thereafter, I may cross by rail from Denmark to Sweden with my own US passport and travel with a very young relative who meets all of the following conditions at the same time: a citizen of at least one NPU country; only speaks English to me; doesn't have blond hair; and doesn't carry ID when already in an NPU country and only visiting or residing in an NPU country during my time there.

Given much of the "human trafficking" of minor children from Denmark to Sweden has apparently been done with the consent of the custodial parents/guardians of the children and been performed by family/friends of the custodial parents/guardians of such children, it would probably work even without trying to do an ethnic profile adjustment as long as the accompanying adult had acceptable ID and could plausibly claim to have a minor child of their own in that supposed age range and had a supposedly akin ethnic appearance with that of the child.

For adopted, minor children and non-adopted, minor children of biological parents with rather different ethnic background mixes than the accompanying adult, who knows what the dynamic will be without ID. Get in line and ask a "random" adult to claim to be traveling together? That would probably work too to get around the ID check at CPH. Are they also going to not only scan/store ID images but also photograph minors and their supposedly accompanying adult?

There seems to be a risk that what is going to go on at CPH is just a game where the rules seem to be made up as they go along. Now, I'm just waiting how much higher than a 10% fare hike I'm looking at when it comes to CPH-Sweden/Sweden-CPH bridge crossings.