Another Reason Why NSA spying is Illegal.

From Olmstead vs US 1928.

[Footnote 12]

The point is thus stated by counsel for the telephone companies, who have filed a brief as amici curiae:

“Criminals will not escape detection and conviction merely because evidence obtained by tapping wires of a public telephone system is inadmissible, if it should be so held; but, in any event, it is better that a few criminals escape than that the privacies of life of all the people be exposed to the agents of the government, who will act at their own discretion, the honest and the dishonest, unauthorized and unrestrained by the courts. Legislation making wiretapping a crime will not suffice if the courts nevertheless hold the evidence to be lawful.”