I agree. The largest and potentially most-revealing information about you is captured by technology companies like Google and Facebook.
The Amsterdam registry recorded "Name, Date of birth, Address, Marital Status, Parents, Profession, Religion, Previous Addresses and Date of Death"
Create a Google account and you are asked to provide: Name, Gender, Date of birth, Location, Mobile phone number.
This is some of your most private and personal information and it's tied to your actual behaviour on the web. Google's ability to track you across the web and across devices is simply unprecedented.
Google omits basic facts in their privacy policy about the data they collect about you. Things like: how long they keep your data (presumably forever), whether the data is anonymised, whether your searches or activity are disassociated from your identity, and who sees your data inside the company.
Does Google use your mobile number solely for two-factor authentication and absolutely nothing else? Google doesn't tell you. Do they really need your date-of-birth? And is it only used for age verification? Could they simply ask if you're 16 or over? Sure they could, but date of birth tied to your online activity is so much more valuable when it comes to crunching all that big data on user behaviour.
The amount of information that Google captures about you is gargantuan. They know more about your online (and possibly offline) behaviour than you know about yourself. Just to be clear, I don't believe Google does anything nefarious with your data. But even if you trust them, why is it considered perfectly acceptable for them to track you to such a relentless degree?