The PKU-registry article you linked explains how one can opt out of having one's sample stored after the genetic screening:
> Den enskilde kan begära att begränsa hur provet får användas eller få sitt blodprov kasserat. Kassering innebär enligt biobankslagen att provet kastas eller anonymiseras
> The individual can ask to restrict how the sample may be used or have it discarded. According to the biobank law, discarding a sample involves either destroying or anonymizing it.
What about the freedom you're denying your child by excluding them from social interactions due to your mistaken puritanical attempts to 'protect' them by home schooling?
I mean, there is no justification. You're actually harming your child. Sure, maybe you're a better maths teacher than the one in the school, but school isn't really about learning such nonsense..
Many Romanians who moved to places like Norway were shocked to see how children are treated there. In Sweden they have banks of the blood of all the babies since 1975 in storage forever ( https://sv.wikipedia.org/wiki/PKU-registret ). Scary stuff.