That also happens to be against the law... let me check my worldwide statute book... everywhere. Anybody that helps you avoid tax liabilities will also be acting illegally.

So you'll need a group of users -- merchants and customers -- willing to flout the law (and possible jail time for conspiracy) in every single country in order to avoid taxes. Good luck with that. Those of us who live in the real world will report taxable income when legally required to do so.