Sony didn't steal the user data, thieves did
It's all too easy to blame Sony for this theft. I don't know what levels of security they had, but like anything if someone is determined they can break in and get what they want. Someone made a conscious decision to break in and steal from Sony, never forget that.
As an analogy say if demonstrators decided to blockade Tesco distribution depot then some people broke in and stole things, would that mean Tesco are rubbish or just mean there are demonstrators and criminals out there.
How would you feel if someone broke into your home/business and stole from you. Would you be saying you deserved it because you didn't have Fort Knox level of security around your piggy bank?