Robert A. Pickering Jr. was known to have said:
What if I registered a domain against your nameservers and then advertised it? What would your nameservers do with the lame delegations? I've had lame delegations really mess up my DNS servers. They spend all their time asking the top-level servers, who just point back to them.
We recently had a downstream customer of ours tell his customer that it was okay to use our nameservers as his secondary for his domains. About 60 of them. The InterNIC appears to have no clear policy on removing the NS records that point to an unwilling DNS server. At one time I actually sent a message off to questions(?)@internic.net on this issue, but never received a response. Our solution was to provide empty DNS records to prevent lame delegation problems.
-Rob
-- Jeffrey Haas "He that breaks a thing to find out what it is has elezar@pfrc.org left the paths of wisdom." (Or works for Fermilab...)