AAS is a low priority. But yes, if you look at bigger labs and domestic sellers getting busted, in the court docs, they bring up seizure records going back years. They even review records of packs going to and from the suspect (same data you see in "informed delivery"). One indictment even mentioned the suspect had sent numerous packs to an unnamed "European lab known as to analyze controlled substances" over the previous few years, using UPS (or fedex, I don't recall).
It seems to me the primary way to avoid getting in trouble is to just not sell. They're not interested in whether you want to screw your lipid panel or go bald while getting jacked. AAS aren't community destroying like real "drugs".