So imagine the field day the irs would have with this if everyone used it. They basically would be able to send bills to owners of wallets. And anyone ever caught working with an undesirable would be able to have their funds more or less locked up.
So now, we all watch as billions of stolen money moves and we know the moment it gets converted to anything real, the owners will be caught. However in the future I could easily see a government watch money that some undesired element has move and no one will want it because the moment they get it they are connected to an undesirable and their wallet becomes tainted.