If the courts regarded tweets and other social media information as private, it would not prevent the law enforcement from getting information it really needs. But the government would have to get a search warrant, which requires it to show that it has probable cause connecting what is being searched to a crime.
In the mind of the public, the word 'planet' carries a significance lacking in other words used to describe planetary bodies... many members of the public assume that alleged 'non-planets' cease to be interesting enough to warrant scientific exploration.
I know firsthand that it’s difficult to get a FISA warrant. From 2002 to 2005, when I was an F.B.I. agent conducting counterintelligence investigations in New York, my FISA applications went through many layers of approval and required very strong evidence.
The NSA is forbidden to 'target' American citizens, green-card holders or companies for surveillance without an individual warrant from a judge.
To get a FISA warrant to spy on a suspected spy, the feds go before a super-secret court located in a sealed room in the Department of Justice. With no defense lawyers present, they need only show probable cause that the target is an 'agent of a foreign power' engaged in intelligence gathering against the United States.
I have been subjected to unwarranted and invasive scrutiny of the most intimate and private details of my being.
I never thought I'd see the day when the U.S. government could listen in on phone conversations or read private mail without first obtaining a warrant from a court. That sounds more like something that happened in the Soviet Union.