An anonymous reader writes "My Skype account was hijacked, which I discovered after Skype suspended it for suspicious activity, including a number of paid calls and an attempt to debit my card. Now that I've secured the account again, I can see the call history — there are several numbers called in Senegal, Mali, Benin and Philippines. Obviously I could call them myself and create a bit of havoc in their lives, but ideally I'd like to trace the hijacker himself — perhaps with some kind of 'social engineering' approach. Or is it just a waste of time?" How would you do this, and would you bother?