Thanks. That was my post. Sad to see others have dealt with this before. I went through their TOS, and there's no way in hell their "Parked Domains" clause is applicable to DNS failovers. What they are doing is just totally wrong. I wrote a second post about it as an Open Letter to them here : http://www.destructuring.net/2013/02/28/an-open-letter-to-na...
I do mind the idea of them treating ever possible 3LD as a parked domain, when my domain is not parked (and configured using their Name Servers).