This assumes that the device with the microphone is sensitive to frequencies above the hearing range. Most devices have a low-pass filter for the purpose of avoiding any input above 1/2 the sample rate of the DAC, since these will create artifacts, aliasing, and distortion. Even in the case that current devices have left out the low-pass filter, it costs pennies to add.
The signal does not have to go through an A/D converter at all. Most competently designed microphone systems have a low-pass filter before the A/D, to prevent aliasing and artifacts, and no signal whatsoever will reach the A/D.
A few years back, I finally got so fed up with the care and feeding of Windows that I bought a PS4 Pro, and gave my gaming rig to my son. For me, it's been a great move. (I've since put an SSD in it, but that didn't speed things up as much as I would have liked.) I love the simplicity of a console, the exclusives on Sony (Horizon Zero Dawn has become an all-time favorite), and NO CHEATERS ON BATTLEFIELD. I'll be buying a PS5 on launch day, with the biggest hard drive, and as much stuff as I can't get with it, no questions asked, and no matter how much it costs.
Maybe. We've heard the same phrases for Josephson junctions, magnetic bubbles, insert your favorite once-nascent technology here. There is still a big distance between demonstration and practicality.
If you are just a political dissident, I don't think anyone's going to be concerned about that.
The problem comes when people express misogyny or racial or religious hatred, or pederasty and attempt to clothe those things as dissidence, or these days even conservatism. It isn't either.
Don't panic.