A tech company using a blog to get whatever imaginary consent from random anonymous privacy-aware individuals is so many levels of unhinged that it makes absolutely no sense whatsoever.
The company wouldn't. Someone retroactively realizes they have the data, and then it does.
I'm certainly not saying it happened, or will happen, here. I'm saying it definitely happens.
This is why in regulated industries, there's an emphasis on "data minimization". Much like the principle of least privilege, but applied to whether you're letting your people or systems be exposed to it in the first place.
It's easy to follow a least privilege policy if there's an actual technical control not just agreement, and even easier if the control is "I never had it, didn't derive it, and made sure I couldn't if I wanted to".
If you aren't collecting it for any use, even inadvertently, you can't retcon it into availability for alternative uses.
> Someone retroactively realizes they have the data, and then it does.
This simply isn't within the realm of reason.
Engineers at Meta have far more impactful problems to solve than attempting to reverse engineer the browsing habits of the 12 privacy-sensitive tech enthusiasts reading their engineering blog.
From a ROI/time perspective, it is far in the negative for a single junior Meta engineer to spend even 10-20 minutes investigating this. It literally is not worth anyone's time.
I'm certainly not saying it happened, or will happen, here. I'm saying it definitely happens.
This is why in regulated industries, there's an emphasis on "data minimization". Much like the principle of least privilege, but applied to whether you're letting your people or systems be exposed to it in the first place.
It's easy to follow a least privilege policy if there's an actual technical control not just agreement, and even easier if the control is "I never had it, didn't derive it, and made sure I couldn't if I wanted to".
If you aren't collecting it for any use, even inadvertently, you can't retcon it into availability for alternative uses.