Whoever said that was very ill-informed.
From IF, a Level 20 can go:
Ironforge -> Kharanos
Kharanos -> Loch Modan
Loch Modan -> Wetlands (follow the road straight north)
Wetlands -> Menethil (you want to go North until the first fork, then go West. Stay On The Road, and Stay Away From Mobs. They are probably Orange to Red to you at this level)
Menethil -> Theramore (take the ship, can't fail)
Theramore -> Barrens (stay on the road. When I did this at Lv27, I never saw a single mob. Go West until the first fork (at the burned down inn, then go south, then go West again)
Once you're in Barrens, the mobs in here are ideal exp mobs for a 20ish character. If you are in a PvP server, well bring a friend or something. If you are PvE or RP, don't do anything that would get you flagged.
Stay away from the Crossroads. The area you want to go is about Halfway up the Map. When you first get into the Barrens, STAY ON THE ROAD. The mobs down there could kill you in 5 seconds flat, but they Shouldn't aggro you if you're on the road. Even if they did, at best, they are Red and you should be able to outrun them, if you do get aggro. Keep heading North. Stay away from Camp Taurajo though. Eventually the road will branch East. Take that. Stay away from the small orc towers, and you'll soon find yourself in Ratchet. To get to WC, at Lv20, the mobs up near Ratchet should be yellow at best, you shouldn't have any problem here. Just stay away from the Horde NPCs and you'll be fine. The Centaurs at Level 20, near WC, can be a pain in the butt, but they should be Green to a Lv20.
--Xylia
Edited, Tue Sep 6 20:25:43 2005 by Xylia