How Far Is Too Far?

Nowadays, it's not very difficult for police officials to trace phone calls, for example, in the case of a 911 call. But what happens when the authorities use cellphone tracking devices to absorb thousands of emails, phone calls and texts in one particular area? According to Clarence Walker's article, federal investigators and law enforcement agencies have now turned to StingRay technology to spy more freely on drug crime suspects.

The StingRay (pictured below) was originally manufactured by a German/ Britain based firm but have now partnered with US law enforcement agencies to spy on potential crime suspects. The device works by acting as a cell tower in order to tap into the suspect's phone conversations, and in doing so, also collects unsuspecting residents' conversations.

After being blocked by a Supreme Court ruling, law officials were not allowed to use GPS technology and eventually resorted to the StingRay. They now claim that even though they are able to listen to other conversations they are not violating any privacy rights and claim it is completely constitutional. Let's keep in mind that they do not issue warrants before tracking other people's calls and they do so with no consent..
How far is the government willing to go to "keep us safe?"