"If you verify via DNS, your entire username is the domain name you verified"
OK, but this is my question: does "the domain name you verified" mean I have official, administrative control over the DNS record for the domain?
As I do for the three domain names I've had registered since 1998
This seems to be very limiting -- unless people want to start making up domain names and registering them into the DNS with no intention of ever using them for any sort of hosting