So then, I think there should be absolute scrutinization of the jurisdictions approving so that we can always have reputable exchanges and also, exchanges should also scrutinize individual traders/vendors partnering with them to maintain good reputations.
By this, we can minimize the level of scams in the exchange and their P2Ps with clients.
I think this particular story has definitely been faced by at least 20% of all CEX P2P users, there is always those looking for any opportunity to use every means to scam people, they statement that he sent the money and it was later reversed was a lie because if it was the case he would have Opened the appeal case first, they tried to trick people and use that as back up excuse. I have seen people labeling bitcoin ad scam because of their gullibility during P2P transaction.
I don’t see the way that the exchanges can actually scrutinize people more than what it is, everything carriers a risk and releasing the coins before fully verifying the funds sent to you can not be help by the exchange, the best they could do is to issue you a warning and they do that before opening a trade and before closing the same trade.
If you personally encounter a problem like that the best you can do is to leave your own feedback on that user, I think it will also go a long to help others