What does our Constitution mean at this point?
“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.”
“What probable cause do they have to search me?”
None. But the Gestapo needs no probable cause.
It all comes down to what is or isn't "reasonable." In other words, the 4th amendment is pretty much a blank slate. The question inevitably ends up in court. The SCOTUS has a variety of tests established over the years, having to do with the "expectation of privacy." It becomes a circular argument, but that's where we are. In short, the amendment is rather useless as long as it contains the word "unreasonable."