https://arstechnica.com/information-technology/2017/11/new-quad9-dns-service-blocks-malicious-domains-for-everyone/
Dunno how I missed this, your royal Taffiness!
Off that the comments section takes one back to the original page. Might be some, there, from someone who's tried it. Does it slow things down. at all? Things like that. Seems quite similar to a VPN, really, doesn't it? I use one of those on my tablet, as a kinda firewall. Google Play hates it. :)