Oh and one last point:
While "reasonable doubt" is most certainly a crux of court proceedings, this notion that as soon as you think that your logic has proven a "reasonable doubt" that you win, is a stretched fallacy created by Law and Order and the like.
Thinking you will walk in and:
A) Get a state official WITH authority in these matters to come in and shoot themself in the foot by stating what is and isnt intended for the public. (Ya know, cause they have attorneys too)
B) Then once that miracle has fallen your way, to convince the jury that their is some public use for this.
is just a stretch of the imagination.
I disagree. The issue isn't whether the transmissions are "useful" for the public. The state would try to say that it isn't which is irrelevant. The issue is that the law itself is poorly worded and provides a plausible loophole. You can't approach this like average joe who reads something and extrapolates what it means. You approach it like an attorney would when representing a client - is there a way to get my client off the hook? Yes? Then exploit the crap out of it.
As for getting a state official to say what you want, it's all in the questioning. You have the right to call anyone up onto that stand, place them under oath, and question them. So use it. Subpoena the director of the communications system. Ask if the system employs encryption. Then ask if all communications are encrypted. Then clarify their statement. "So, just to clarify, if a channel carries sensitive information, such as surveillance or SWAT activity, your policy is to encrypt that, but not normal routine stuff, like a public works engineer repairing a sewer pipe or a police officer responding to a shoplifter. Is that correct?" Yes. "OK, so if a communication is not encrypted, it is permissible for any member of the general public to monitor that communication?" And so on. If you ask the right questions, you can get them to say they always wanted a little white pony for their birthday, if that's what you need them to admit to prove your case.
Again, it's a stretch, but I think a good attorney could pull it off.
-AZ