Today's Bond, Daniel Craig, was in an amazing film directed by Matthew Vaughn - Layer Cake - about the drug ring in the UK.
Craig's main Character had this to say to avoid getting caught, but I think it has value far beyond the white workers:
It is vital that we work to a few golden rules:
Always works in small teams.
Keep a low profile.
Never deal with anyone who doesn't come recommended.
I mean it's like selling anything: washing machines, hand made rugs, blow jobs, as long as you don't take the piss people will always come back for more. And that's not to say that we don't have that special kind of magic that turns two kilos into three. But never get too greedy.
Know and respect your enemy! It is only very very stupid people who think the law is stupid.
And avoid like the plague, loud attention seeking wannabe gangsters who are in it for the glory, to be a face, to be a name. They don't mean to fuck up. They just do.
Oh, and forgive me for stating the obvious, but stay away from the end user.