If you want to sell your products and services for pink shells while ignoring pesky things such as laws and taxes, you might get away with it personally. But if you would convince every merchant in your town to do the same then your local tax office would notice. Then some unpleasant people might pop up demonstrating the evidence that they do in fact have some de facto authority over you without your consent.

But since every merchant in your town knows how this ends very well, you won't convince them in the first place, unless you live in US in 18th century.