Originally Posted by Dangerouz123
so basically your saying, that i can use my friends account and login to the WoW web, download the client+use the expansions he has and make a new account and start playing without having to purchase the game?
Yup, but you can't create an account that will be playable without the CD keys. Thus, you will have to buy the games in order to have the CD keys.
Once you buy the game or any of the expansions, it "binds" to your account.