Do you agree that extorsion violates natural rights?
You are referring to a legal term, which refers to a statutory crime. The incidence of the crime, almost always involves elements that would not pertain to a state of nature. I would agree that one of the reasons men create governments to secure their natural rights, is to define actions that will be punishable. I have no idea why you pose the question as you do; but if anything it obfuscates rather than clarifies.