Liberty is rarely lost overnight. The wall of tyranny often begins with benign building blocks of safety — each one lying on top of a predecessor — eventually collectively constituting an impediment to the exercise of free choices by free people, often not even recognized until it is too late.
Here is the back story.
In the pre-Revolutionary era, British courts in London secretly issued general warrants to British government agents in America. The warrants were not based on any probable cause of crime or individual articulable suspicion; they did not name the person or thing to be seized or identify the place to be searched. They authorized agents to search where they wished and seize what they found.
The use of general warrants was so offensive to our Colonial ancestors that it whipped up more serious opposition to British rule and support for the revolutionaries than the "no taxation without representation" argument did. And when it came time for Americans to write the Constitution, they prohibited general warrants in the Fourth Amendment, the whole purpose of which was to guarantee the right to be left alone by forcing the government to focus on bad guys and prohibit it from engaging in fishing expeditions. But the fishing expeditions would come.