TLDR: I spent some time chasing smugglers, and then spent some time pretending to be a smuggler as a training aid for teaching people to catch smugglers.
The means of production is VERY much the issue.
Part of what I always enjoyed about Traveller is how it can be inspired from almost every facet of my life. In my misspent youth, I spent a lot of time learning about "precursors" in smuggling, the drug trade and counter-proliferation. These are the items that seem innocuous, have multiple uses, but can be critical components for the illicit trade. Some of the time, we would seize items from people who had zero idea that there was a nefarious option for their dual-use items. Sometimes there is a legitimate purpose that "outs" a government agent (I was once pulled off a plane at Charles De Gaulle because my laundry reeked of explosives residue). Sometimes, they were very obviously skirting the law ("Why do you have twenty aerospace-grade titanium solvent traps handily threaded for 5/8-24 in your [Austrian-Firearm Manufacturer] branded baggage?").
This farcical event can make for some very fun Traveller adventures, with the Patron using the crew as unwitting smugglers ("What? The Book of G'Kar is considered heretical contraband? I can't even read Narn, how was I supposed to know what these are? I just work here...")
Here is a fun read for inspiration:
https://www.unodc.org/pdf/uzbekistan/PrecursorRep.pdf