There’s a very important point to be made here.
Privacy in the digital age is not necessarily about secrecy, it’s about access. The question is no longer whether someone can know a piece of information, but also how easy it is to find.
If you take a bunch of available information and aggregate it to make it easily accessible, that’s arguably a worse privacy violation than taking a secret piece of information and making it “public” but putting it where no one can find it (or where they have to go looking for it).
This is a very important disctinction when you’re looking at corporate log gathering and data harvesting. Sure – your IP address or your phone number may be “public information”, but it’s still a privacy violation when it’s put in a big database with a bunch of other information about you and given to someone.