The 10g rule is something I just say off the top of my head. Yes it's arbitrary, but there's a rationale behind it.I think it's obvious that the chances of interception rise geometrically with respect to package size. When you look at all the interception/arrest stories, it's almost always > 1kg.Now, I also believe that most drug dealers couldn't distribute through the postal system since they don't do their research. If the package is greater than 1kg I don't think you can pop it into a USPS blue box, which means they almost certainly were on the PO camera paying for the shipping of > 1kg of cocaine or whatever. Which seriously calls into question their I.Q.What the max quantity you should ship really depends on is:= Professionalism of the vendor= TimeBut seriously, why does anyone ship > 1kg at all?Even beside the fact the PO is more likely to intercept, diversification is always a good thing in this business for a variety of reasons, the higher the quantity shipped, the more incentive the other guy has to rip you off. But if you ship in smaller quantities, you're the golden goose who lays the golden eggs. I think if you have a desire to put a tracking number on a package, then you are shipping in too large a quantity.You could just as easily ship 10 1/10 kg packages with probably 10 times less chance of being intercepted! I can't prove it, but I'm pretty sure you're a 100 times less likely to be intercepted with a 10g package.