The courts have a long and sordid history of interpreting the constitution in ways that defy common sense, logic, and plain reading. They ignore obvious limits on government power and invent imaginary rights to suit their whim. You say "the courts say it's legal" and I say "So what? The courts pull all kinds of crap out of their butts, and call it law." A better question for citizens of a Republic would be: "Is this really where we want to go? Is constant government surveillance of the citizens what this country is all about?"
I say "no". The courts AND the legislators are FOS and need desperately to be reined in.
Where do you stand, copper?
Play with your strawman outside, run along while adults debate the case.