Having people illegally hack your system really isnt Sonys fault, it happens and has happened for years to banks, stores and even government type places. Where its bad is how long it took Sony to say or even ID that personal info 'may' have been taken by the hacker.
There have been plenty of people/experts saying if you do anything with a credit card/debit card you have about the same chances to have your info stolen. Either way 'Anonymous' really screwed over alot of people with their hacking once again and now have 75 million or so peoples personal info to play with.