Interesting fact, but the article's opening argument lost me - with increasing frequency, 7 out of 10 concurrent incoming emails are spam.

DNS traffic makes up 1% of all internet traffic. My 15 year old g550 can easily handle 10,000 queries per second with fail2ban enabled, root servers are not under threat from repeat and erroneous DNS queries.

Further, attempting to filter or 'detect' misconfigured devices is much more likely to snare innocent users with aggressive DNS settings that may or not be accessible to the user... See cloudfare and Anubis.

With the AWS outage (ironically they claim DNS issue as the cause) fresh on everyone's mind, the last think the tech community should consider is adding more points of failure to foundational internet components.

Since most of the 70% is asking about domains that don't exist this could just as well be reframed as "DNS resolvers have excellent cache hit/miss ratios".