If i got this right you basicly just take the persons other acount witch means you have 3 acounts now,mian account,alt account and the new account you just scamed?
ok the only problem there is when the person contact blizz and provide them whit his 2 CDkeys to show he is the legal owner of the account blizz will get him the account back.
I dont think it will work :P but it is a good idea mabe scam a account and trans the chars fast or something like that