I often use the same password for sites I don't really care about. This does not mean I use the same password on my work / banking / eBay / paypal accounts.
This might explain why so many people used the same password for Gawker and SonyPictures.
This might explain why so many people used the same password for Gawker and SonyPictures.
This is much more reasonable than asking everybody to remember 50 unique passwords.