When Sony was first hacked, I wondered if they had left all of their account data in paper, out in the open, behind the building and someone just happened to walk on by and pick it up after jumping over the simple security rope. And now, after the warning that people needed to change their usernames/passwords, apparently those who were too lazy to change those suffered.
This isn't the first time a major corporation had a breach like this. Remember when the gamer point code algorithm for the Xbox 360 had been figured out and the small group had managed to redeem all of those generated codes for stolen points? If I remember right, the article was posted somewhere on Kotaku and the point value was stated to be around $10M USD.
Events like these remind me of such things and always reignites my fears of being compromised again. I also wonder who has the list of names/passwords and just how large that list is. Hopefully I'm not on it, even though I don't have an account with Sony.