Alright so we all know the way to prevent your victim from getting his account back after you have scammed it. Make a new account with the same last name and transfer it yadda yadda. So what you do instead, is this:
1. Go out and buy a WoW Prepaid Game Card (Less Expensive than buying 2 new WoWs.)
2. You should have a guest pass key inside the game-card box.
3. Make the guest pass account AFTER you have scammed the victim of his last name, use the last name for the account and transfer all your scammed characters there.
4. Once your 10 days is over, you have frozen account without having to buy WoW and use the CD-Keys again.
5. Use the pre-paid game card to re-activate your account!
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Its THAT easy!!