Fraud? It's bitcoin man. There's no concept of fraud. Or are you implying that there should be some sort of regulating body that would enforce generally accepted fraudulent behavior?
In the same way that cryptography and distributed ledgers create a way to validate property ownership without a central authority, signed messages provide a way to validate identity without the need for courts. There is definitely a framework for identifying truth versus fraud using solely cryptography. I don't understand your point.
His point is that cryptocurrency is the wild west. Claiming to be someone you're not is, unless you're actually executing identity theft by e.g. taking out loans on someone else's name, is not illegal AFAIK.
I'm not sure what he's trying to achieve, in any case. It's not like the title "you are Satoshi" will do much. You become a key player in the crypto industry by merit, not so much by name.
