The fact that fraud is a crime is a form of regulation, although it's clearly not sufficient on its own (just like how smart contract code being auditable isn't sufficient on its own)

Sure, but it's not specific. I'm thinking more along the lines of requiring public SEC filings or prospectuses.

Then you are arguing for allowing fraud and crime.

Yeah, but if they're not personally affected, it's fine.

People who are affected are just dumb or they had it coming, anyway.