What is the current state of the law on electronic surveillance?

The reason for this protection is the realization that if the state were free, at its sole discretion, to make permanent electronic recordings of our private communications, there would be no meaningful residuum to our right to live our lives free from surveillance. The very efficacy of electronic surveillance is such that it has the potential, if left unregulated, to annihilate any expectation that our communications will remain private. A society which exposed us, at the whim of the state, to the risk of having a permanent electronic recording made of our words every time we opened our mouths might be superbly equipped to fight crime but would be one in which privacy no longer had any meaning. As Douglas J., dissenting in United States v. White, supra, put it, at p. 756: "Electronic surveillance is the greatest leveller of human privacy ever known." If the state may arbitrarily record and transmit our private communications, it is no longer possible to strike an appropriate balance between the right of the individual to be left alone and the right of the state to intrude on privacy in the furtherance of its goals, notably the need to investigate and combat crime. ... But, for the reasons I have touched on, it is unacceptable in a free society that the agencies [page45] of the state be free to use this technology at their sole discretion. The threat this would pose to privacy is wholly unacceptable.