Interesting, thanks.This is not always true. There are plenty of examples of law enforcement going after small orders and small amounts of possession. A lot depends upon where you live, and USPS will turn over their evidence to the locals if local law treats possession more harshly than the federal system (which is true for most states for steroids and probably so for hgh, as well).
In germany there are 16 different federal states, and the law is all over the same, but in some states, the justice is more relaxed than in others.
In bavaria, as example, there are very strict and penalty from their courts are many higher as in some others.