Obvious–and wrong. The laws we have, the ways we do things, are not handed down from heaven on tablets of stone. They are human contrivances, solutions to particular problems, ways of accomplishing particular ends. If technological change makes a law hard to enforce, the best solution is sometimes to stop enforcing it. There may be other ways of accomplishing the same end–including some enabled by the same technological change. The question is not "how do we continue to do what we have been doing" but "how do we best achieve our objectives under new circumstances?"