[nznog] Authoritative DNS config

This isn't an NZ specific question, and also perhaps a bit basic; hope that's ok. Packaged (debian, ubuntu anyway) versions of BIND come with various default zones configured - localhost, broadcast and root hints. Are any of these actually necessary for an authoritative-only name server? It seems to me they're mostly/only useful for short-circuiting simple/standard queries on a resolver. Is that right? Not having any other zones than my own in my config would make it somewhat easier to configure views. Thanks, Richard