That they don't share shadow data on request is already breaking the GDPR.<p>Even if they would get some lawyerish twist on it, sometimes grey scales isn't needed. Just give me my effing data - if you have it you have it.<p>It's a bit of FB meta-theme on HN right now, and I wrote something similar before in another comment, but I really wish we could have some whistleblowing considering the shadow data.