After congress received a spate of mail threats, BILLIONS were allocated to scan every piece of mail going through the system and, of course, more and more use of that data has been made by the government.
The moment one signs up for Informed delivery, the scans of incoming mail appear immediately.
What you can see in court records is that, when an investigation is launched, for dealers of illicit goods in particular, they can go back years, make connections between senders and recipients, look for other addresses in a certain radius that may be used by the target to avoid detection, pull up related video surveillance from P.o. boxes. The capability is unbelievable.
I concluded the only way to stay out of trouble is not to do anything that seems to grab their attention, like selling or getting involved in serious drugs.
Luckily, for now at least, AAS and sched 4 end users aren't a priority. They don't want to expend limited resources on a case most likely to end up being dismissed with a slap on the wrist like drug treatment or a brief period of probation.