Allow for a comparable example, dating to the early 1980s in a place called Baltimore, Maryland.
There, city detectives once began to suspect that major traffickers were using a combination of public pay phones and digital pagers to communicate their business. And they took their suspicions to a judge and obtained court orders — not to monitor any particular suspect, but to instead cull the dialed numbers from the thousands and thousands of calls made to and from certain city pay phones.
Think about it. There is certainly a public expectation of privacy when you pick up a pay phone on the streets of Baltimore, is there not? And certainly, the detectives knew that many, many Baltimoreans were using those pay phones for legitimate telephonic communication. Yet, a city judge had no problem allowing them to place dialed-number recorders on as many pay phones as they felt the need to monitor, knowing that every single number dialed to or from those phones would be captured. So authorized, detectives gleaned the numbers of digital pagers and they began monitoring the incoming digitized numbers on those pagers — even though they had yet to learn to whom those pagers belonged. The judges were okay with that, too, and signed another order allowing the suspect pagers to be “cloned” by detectives, even though in some cases the suspect in possession of the pager was not yet positively identified.
All of that — even in the less fevered, pre-Patriot Act days of yore — was entirely legal. Why?
Because they aren’t listening to the calls.
