The privacy policy for 8.8.8.8 is actually really good: https://developers.google.com/speed/public-dns/privacy
I wish more google products were so explicit in what they log and for what purposes.
(Disclosure: I work for Google)
(Disclosure: I work for Google)
A lot of google engineers read hacker news comments, reddit threads, etc. all the time, and generally try and route good feedback where it belongs.