quadraginta
Becoming Beth
Oh, I agree. Nobody should be put under surveillance without proper procedures being followed. The problem is that we are. We all are. Wiretaps are sort of so-Seventies. There are other ways to follow people. The cell towers were brought into evidence and none of those people were properly consulted before that happened.
None of us know how much we are under surveillance even when making a routine cash withdrawal but we are.
Wiretapping is no more intrusive than that little mirror you see on your ATM or the camera in the convenience store watching you buy Hustler. (Not that I think you buy Hustler, of course, but if you did...)
I have to concur with HB here, at least from the perspective of an application of U.S. law.
The main ruler is "reasonable expectation of privacy", which boils down to whether or not the actions in question could be commonly perceived without extraordinary measures. This applies to such activities as the traffic surveillance you mentioned, or cameras in public venues. No special permission is required if the activities are in a public venue to begin with.
Cameras on private property; ATMs, stores, etc., are marginally more problematic, but generally relate to the wishes of the property owner and the expected usages of the space in question. This viewpoint gets sticky, as in the example of recording phone conversations with the consent of one or more parties involved, an issue which is treated differently by different states. E.g., in North Carolina a call can be recorded if any party involved consents, but in California all of them must or the recording is a violation of privacy. The individual states are somewhat schizophrenic, and pretty equally divided about this issue. In the absence of the informed consent of any participant a warrentless wiretap is basically illegal. (I say"basically" to avoid the minefield of Homeland Security and Patriot Act laws. We don't need to go there.
The cell tower info you mention would be considered privileged, and would not be provided to LE without a warrant. It is viewed in the same light as any unwarranted search and seizure, and the surrender of that information by the telecom provider without such a warrant would not only be illegal, but could make that provider vulnerable to substantial civil damages as well. They are very sensitive about such issues, and their uniquely vulnerable position as custodians of citizens' private information.
Wiretapping is far more intrusive than a camera at an ATM or Quicki-Mart, simply because in the latter two instances you are placing yourself voluntarily in a public or functionally public venue. Your reasonable expectation of privacy is sacrificed by your own choice and actions. Even in these situations the records obtained by recording devices are not automatically public. They belong to the owner (or proprietor) of the property and equipment, and without free consent a warrant is still required for law enforcement to acquire them. It is not unusual for LE to obtain a warrant for such records even when the owner's consent is freely provided, just to avoid legal issues in the courtroom.