I would go with what you said above - a type associated with the FaultException. You can create any number of classes represented as a DataContract to handle various faults, and then assign them to the WCF Service operations.
I always use FaultExceptions and advertise them as part of the OperationContract, as your code does.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.