you might want to revise that, because it isn't "if you give hackers a starting point they will find a way in" its "if you piss off a hacker and expose the right starting point they will find a way in"
real hackers are explorers searching for information, they don't just hack without reason, why would they want your account, what makes it so special?
besides, the attack on PSN was the entire network not individuals so as Karbuncle said, your point with that is irrelevant