[devjab]

I don’t know if it is like this in many countries but in Denmark we have a public registry of addresses, and I’d assume Google (and others) simply pull from that. There are ways to avoid being on the public list but most people aren’t doing that, and if your parents didn’t do it for you then you’ll have been in the registry at one point.

I guess it won’t tell big tech who your friends are. At least until you talk with them regularly through online channels.

[sandreas]

I'm not afraid of having parts of my information online in general. Having a website often needs an imprint with a big part of your data. It's more like the information only friends and family know of and which are way more important in many senses.

- phone - this is kind of ok, because phone spam is less common

- email - to prevent spam

- birthday - this one is quite critical, because here in germany it is a common way to verify authentication on phone calls by insurance companies

- job-details, contact relationships, etc.

I doubt that these are all in the public registry.