The efford was done here though. So do I understand you correctly that this is a bad example to discuss because you have no way to prevent this?
Let me rephrase that: You say you have no way to prevent someone that is willing to put in efford in order to scam?
I would like to challenge your IQ now. This question just made me feel sick about you!
Can you please tell me your age?
Are we even discussing at the same level? Did I ever say on this entire thread that taking precautions/implementing rules would mean that nobody would ever get scammed?
On separate note: I myself have been scammed thrice.
Once a person hacked a trusted person's account & used his identity to make me send bitcoin 1st. Though it was just $10.4 worth of bitcoin
2nd time the guy charged back $60 saying it as unauthorized transaction after I sent him BTC
3rd time PayPal fucked me by reversing the $140 to the sender and then that person turns out to be a con artist.