"Back to topic, we do understand modulation and demodulation quite well, thank you."
Great. Now if you start to understand what you are talking about you might start to get a clue. Understanding TCP/IP doesn't mean you can capture a bitstream and understand it. If it did, then TLS would be quite useless, wouldn't it?
tldr; you aren't smart; stop thinking you are.
"Justice department policy is not the law. If they obtained the match legally by use of a subpoena or warrant, it would still be admissible. If it is not admissible, they cannot use in court, but that would not necessarily prevent them from using other evidence to get a conviction."
That is correct
Mr. Cole's Axiom: The sum of the intelligence on the planet is a constant; the population is growing.