No one is blindly trusting anyone. The buyer would NOT find anything solid even if he suspect that QS and Panthers52 is the same person. It is not possible for the buyer to establish they are the same person with reasonable diligence
If it is not possible for the buyer to establish that then he should not trade with that person. Did it say in the escrow contract that he isn't the same person as another party in the trade?
Ah Dang! saw your post..
So, I kill you and claim that I hadn't mentioned "I won't kill you." in the contract? LOL, you are just stupid.

Edit: forgot to add "Caveat Emptor". Your fault that you died.
