Ok so this guy has filed a lawsuit against Gamestop for not telling him that the single use serial keys in a USED game were... USED.

First of all this is not a Gamestop issue, this is an EA issue and its something they really do need to fix. Look at the problems they had with SPORE for instance.

Second this is not even an issue EA are unwilling to fix. I also bought a used copy of DAO, my keys were used but I have the DLC on my account and I got it for free. All it takes is a phonecall to EA customer service and telling them that your keys don't work. They will quite happily put the DLC on your account and presto chango, free DLC.

Gamestop should not be held accountable because the idiot did not have the forethought to call the customer service team responsible for producing the game in the first place.

I had a similar experience with Microsoft, I got my copy of Office 2007 on release. I have upgraded my OS and bought numerous newer machines since then. I am not going to buy a new version of Office every time I change my OS or machine. One quick call to Microsoft fixed all that.