Well to do this scam you must go to a forum that sells and buys accounts and were you can offer power leveling and services)
Then go and say that your power leveling for free because you dont have a wow account and you want to enjoy the game without paying.
Lot of people will give you there details then go on there account take there gold and posibly the account.
This worked 2 out of 3 tries for me.
Got 210 gold in less than 40 minutes of doing this.
Not bad.