I'm not sure if libbabble zones is sposed to cover all towns, but heres a listing of towns not supported (its a lot of them, tho not every town, these are just the ones i know)

"Acherus: The Ebon Hold"

"Area 52"

--Horde Towns

"Bloodhoof Village"
"Bloodvenom Post"
"Brackenwall Village"
"Brill"
"Camp Mojache"
"Camp Taurajo"
"Fairbreeze Village"
"Falcon Watch"
"Falconwing Square"
"Flame Crest"
"Freewind Post"
"Garadar"
"Grom'gol Base Camp"
"Hammerfall"
"Kargath"
"Mok'Nathal Village"
"Razor Hill"
"Revantusk Village"
"Sen'jin Village"
"The Sepulcher"
"Shadowmoon Village"
"Shadowprey Village"
"Splintertree Post"
"Stonard"
"Stonebreaker Hold"
"Sun Rock Retreat"
"Swamprat Post"
"Tarren Mill"
"The Crossroads"
"Thrallmar"
"Thunderlord Stronghold"
"Tranquillien"
"Valormok"
"Zabra'jin"
"Zoram'gar Outpost"
"Agmar's Hammer"
"Apothecary Camp"
"Bor'gorok Outpost"
"Camp Oneqwah"
"Camp Tunka'lo"
"Camp Winterhoof"
"Conquest Hold"
"Grom'arsh Crash-Site"
"Kor'kron Vanguard"
"New Agamand"
"Sunreaver's Command"
"Taunka'le Village"
"Vengeance Landing"
"Venomspite"
"Warsong Hold"

--Alliance Towns

"Aerie Peak"
"Allerian Stronghold"
"Astranaar"
"Auberdine"
"Azure Watch"
"Blood Watch"
"Chillwind Camp"
"Darkshire"
"Dolanaar"
"Feathermoon Stronghold"
"Forest Song"
"Goldshire"
"Honor Hold"
"Kharanos"
"Lakeshire"
"Menethil Harbor"
"Morgan's Vigil"
"Nethergarde Keep"
"Nijel's Point"
"Orebor Harborage"
"Rebel Camp"
"Refuge Point"
"Sentinel Hill"
"Southshore"
"Stonetalon Peak"
"Sylvanaar"
"Talonbranch Glade"
"Talrendis Point"
"Telaar"
"Telredor"
"Temple of Telhamat"
"Thalanaar"
"Thelsamar"
"Theramore Isle"
"Toshley's Station"
"Wildhammer Stronghold"
"Amberpine Lodge"
"Explorer's League Outpost"
"Fizzcrank Airstrip"
"Fordragon Hold"
"Fort Wildevar"
"Frosthold"
"Star's Rest"
"Valiance Keep"
"Valgarde"
"Westfall Brigade Encampment"
"Westguard Keep"
"Windrunner's Overlook"
"Wintergarde Keep"

--Neutral Towns

"Altar of Sha'tar"
"Cenarion Hold"
"Cenarion Refuge"
"Cosmowrench"
"Emerald Sanctuary"
"Evergrove"
"Halaa"
"Light's Hope Chapel"
"Marshal's Refuge"
"Mudsprocket"
"Nighthaven"
"Sanctum of the Stars"
"Sporeggar"
"Stormspire"
"Sun's Reach"
"Thorium Point"
"Amber Ledge"
"Argent Tournament Grounds"
"Argent Vanguard"
"Bouldercrag's Refuge"
"Crusader's Pinnacle"
"Death's Rise"
"Dun Niffelem"
"Ebon Watch"
"Frenzyheart Hill"
"K3"
"Kamagua"
"Light's Breach"
"Moa'ki Harbor"
"Nesingwary Base Camp"
"Rainspeaker Canopy"
"River's Heart"
"Shadow Vault"
"The Argent Stand"
"Transitus Shield"
"Unu'pe"
"Wyrmrest Temple"
"Zim'Torga"