Postage on a post card is currently 33 cents. How many postcards do you reckon you'd have to send before the automatic scanning process costs even one cent extra?
It seems like it would be a self-defeating process since the cost built into sending "data flak" would pay for the services monitoring it.
Misdirection: it's been used in magic for a long, long time.
So what happens when a piece of software can be used as a terrorist device? We're going to run into that. Soon.
If a person were to send periodic letters with real and fake cryptographic messages to random individuals of importance, barring a warrant to read the contents of each letter, that would constitute reasonable doubt as to whether or not that person was legitimately communicating with another person of interest.
As long as such a system is in place and significantly predates (on the scale of years) any crime you are accused of, this argument of hedging against a dystopia makes a lot more sense and is far more defensible.
That is impressive, even if you are a lawyer.
why put a stamp on if you don't care about where it goes? better yet, put a 1 cent stamp on and make sure it gets extra handling for postage due.