And this is one of the many reasons I run my own DNS. The only way they could blackhole something from me would be to null-route the IP address itself (and all the associated issues that causes), or convince ICANN to return NXDOMAIN or something from a root server.
I realize not everyone has the ability, knowledge, or even motivation to do this, but it really is worth doing. I'm a retard and got it working just fine, so others should be able to. Fuck ISP DNS servers, double-fuck Google and CloudFlare DNS, and hell, fuck Quad9 and the rest just because I'm that salty.