A VERY easy scam to do, all you need is a private server.
I am going to use Verdant Fields as an example, it can be anything from Ironforge Airport to Wetland Farms.
1. Teleport/Recall port to the Verdant Fields (.Recall Port verdantfields/ .tele verdantfields).
2. Spawn a bunch of npcs and objects that suit the place near a giant tree area and make it seem like a real WoW place.
3. Use frapps or gamecam to make a really good video. Make the video seem like a trailer, and make a detailed website that when you go to certain sections, it you have to log in using your real WoW account.
Remember to add stuff like screenshots and additional short videos of your fake instance.
4. Add a special feature to look at a certain part of the website ( a large unique part ) that you have to verify your login and password
5. They'll come and login lots, so if they get their username or pass wrong they'll give it to you again
6. Spread it to some people and they'll spread it to their friends, you got a fest! just NEVER mention your username or password.
7. Update with small updates sometimes. NEVER EVER post one of the videos on your website on youtube or THE SCAM WILL BE KNOWN AND DESTROYED
This will take about a day or 2, maby 3 if u make it amazing, but u'll be getting tons of accounts and tons of accounts!!!