I hope the downvotes are for the sarcasm, not the point expressed. But considering other threads about this have been flagged[1] I guess this topic is taboo.
A common sense approach would be to say that if someone in Europe chooses to submit their details to an entity based outside of Europe then that's just their choice to waive their rights to their data.
Lawyers and legislators might make arguments and talk about analogous laws and situations but that simple doesn't convince a lot of people. Hence you will get downvotes for saying something so common is illegal.
(As a side-note it's interesting that you personally choose to submit your copyrighted comments to HN given your knowledge of how you're losing effective control of your information.)