So is there any way FOR SURE to keep a scammed account?

[Ryoushi.]

Use it for scams or give it to me so I can use it for scams

Not happening ._.
And Gritts is right. There's no way you can take an account and 100% keep it. It's a chance thing. Depends on how intelligent the scammed account's original holder is and how much information they have as well as how much information you have. It's a pretty risky business so you can't accept any guarantees on anything.

[Rubs90]

A scammed account can ALWAYS be recalled, or end up getting banned (if they keep trying to recall it and you both send in an ID). Even if you get it banned yourself after transferring, the person can tell Blizzard they were hacked and get it unbanned after the investigation. Then retrieve their character after a few weeks of waiting, and probably get your second account banned.

The only scammed account you can keep is one that the person dosn't have proof he's the original owner of. And even then, the real Original Owner could decide he wants it back and get it from you later. So its never 100%.
(For example, I just recalled an account I sold 2 years ago :P)

Not to say you won't end up keeping some. But the vast majority will fight to the bitter end to get a decent account back. And you will end up getting into an "Original owner" fight and get it banned if you send in a fake ID and they can't tell who's who.

Scammed accounts are only for the purpose of making money off of(Account renter's, selling them, w/e), or using for short term scamming/exploiting reasons. IMO at least.

Well I don't have any account to play legit so I'm gonna have to take my chances

[treeko11]

Or you could always put a Blizzard Authenticator on it, that way, its almost guaranteed to be yours.

[xsplicit]

I have been using this method, so far - so good, great success:

1. Scam an account (do it on Friday, much time to do everything(I think You know it, though))
1.1. You should have all information, at least e-mail control and last name.

2. Buy/get CD-keys and make an account with the same last name as the scammed account.

3. Transfer the character/characters to Your new account.

4. Ban the old account.

5. Profit and don't worry - be happy now.

couldn't be better said