Not going to happen I'm afraid. If it was possible to do so, there would be a hell of alot more complaints about stolen accounts and virtually ANYONE would become vulnerable. With that being said, there would be no way to prevent the stealing of accounts.
Getting access to the games are not. Sometimes steam has huge discounts on their games, such as last week they had Half-Life 1 for $0.99 thats less than a buck ... buy it.
well, personally i think you should buy the games. I dont think it is a good idea because you should "put yourself in their shoes" and see how you would feel if your account was stolen (one which u paid over $250 for)!!!!