My opinions:
1.) I honestly don't care that catwomancomics (CWC) used PayPal f&f for this transaction. I get it's a rule for marketplace (which this wasn't), and I get it's a PayPal policy...I still don't care.
2.) I knew, with little doubt, who the guilty party was purely from the PM exchange. I was honestly impressed with CWC's level of graciousness. Considering it was PayPal f&f, CWC could have said whatever they wanted without recourse. There was no reason to be courteous, yet he/she was... Good on you for showing class.
3.) When I saw the returned contents weighed, and it matching the return parcel weight....game over.