[K0nserv]

Yup I do this too and I agree with your observations, about one third of my home network's DNS request are rejected with nearly no impact on my internet browsing. I've also observed the same thing when browsing the web with uBlock Origin set to block third party scripts by default. On most sites whitelisting ~20% of scripts is enough to make the site functional, the other ~80% apparently being redundant for the purpose of the site's core functionality.