The above poster is correct. Millions of packages of drugs are sent through the system monthly. More insurance companies are encouraging people to but through mail order companies so three months worth can be sold at a discount.
A side note. I have a co-worker who moonlights as a UPS worker at the local warehouse. He says the amt of pot that goes through their system is enormous.
BUT_I'm still waiting for the DEA/COPS film crew to jump out of the back of the truck. I've prepared my response in sdvance.