Originally posted by zozozozo
You can try sending feedback (link at bottom of every page). Not sure if the resigned games can be reopened tho...
In this case, I don't think so.
An account cannot be hacked.
A more probable scenario would rather be that he forgot to log out at a public accessible computer, or a computer where not so good friends were at the time he went to the loo or something. Or that he had a easy guessed password, or had written it down somewhere otherse can see, or a lost note or something.
But that the account was hacked? No, I don't think so.