>> Also note, i.e. stuff like statutory rape has been upheld even in cases where the perpetrator in all good faith thought the victim was 18+, the victim initiated selling the services, and the victim provided fake ID showing they were 18+.

You had me up to the "selling the services" part.

If you are 'engaging' with someone in a criminal enterprise it's probably reasonable to assume they might misrepresent certain facts to make the sale.