This would be difficult to write as a law and very difficult to enforce, though I like the idea of the burden of proof being on the operator. In India we have

This would be difficult to write as a law and very difficult to enforce, though I like the idea of the burden of proof being on the operator. In India we have a national DND (Do Not Disturb) registry that anyone can signup for and choose whether to receive marketing communications or not, and what categories therein. The regulator has made the operators enforce the reporting mechanism along with penalties (monetary and otherwise) on the marketers for violations. But still, there are cases where a marketer may claim that the person receiving the call/SMS opted for it and signed up or had some transactional relationship with the company.