Sony can not get your real name and address from your IP, There is laws in the united states that prevent anyone including law enforcement from acquiring this information without a warrant.
Why do you think it takes up to 4 years for them to bust someone who uploads pirate material. In order to get their real address and name they must get undeniable evidence that this person is uploading material in order to get said warrant.
What un deniable evidence do they have to say that you are 100% do what you are doing, none they must be inside your house to see it. It is the reason Microsoft never did it and instead banned. Trying proving to the courts that you are circumventing security because your drive takes .024 ms longer to respond that a stock drive.