[theturtletalks]

Even if what they hear is inadmissible in court, parallel construction is a real thing and they will find a way to work backwards.

[shevy-java]

It is basically an unfair advantage, even if inadmissible in court. The state can find more facts even in illegal ways; and this assuming the government is fair rather than criminal. I have a hard time trusting governments who mistrust the public.