We should consider not using Google public DNS, and instead use something like OpenNIC in /etc/resolv.conf by default.
I agree that using Google DNS servers by default is problematic: Tracking concerns.
OpenNIC is interesting but a politically radical move, which I don't think we should do by default either.
Is a default needed at all?
I believe debian-installer has no default DNS server, but asks the user if no local default is signalled via DHCP.
Hmm, Calamares doesn't set any DNS resolver, and resolv.conf is fully autogenerated on all PureOS systems. On my system, NetworkManager automatically configures a DNS server when I connect to a network.