Valve Deletes Steam Accounts

"Yesterday, Valve disabled approximately 20,000 Steam accounts which had been used to try to access Half-Life 2 without purchasing it. The method used was extremely easy for Valve to trace and confirm, and so there is no question that the accounts disabled were used to try and illegally obtain Half-Life 2. "
It would also seem that this was a blanket deletion so if you ever used a bad key to access steam (even if you bought the game afterwards) your account will be killed.

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