People have been ordering other illegal substances over the internet and mail order for awhile, so i'm not surprised that you can do so with weed as well. Here are some safety tips from the steroid community... all good advice though:
The Pickup
Do not be too eager to rush down and get your package the moment it arrives, like some kid waiting for his sea monkeys. If you do have it sent to your home, mark Return To Sender on the package with a big black marker. If you're going to be busted, it's going to happen with a few hours of receiving the package, the cops aren't going to risk waiting days and have the items disappear.
By marking the package in this fashion, you can always claim that either a) the package was addressed to someone who didn't live at your residence so you were going to return it to the shipper (only works if you ordered to your home under a fake name obviously) or b) you didn't recognize the addressee and weren't expecting any packages so you were going to return it the shipper (this is much more plausible after the anthrax scare).
This MAY work to get you out of trouble, but only if you're smart. If you've got gear being shipped to your house, it's not a good idea to have gear in your house. It's going to be very hard to use either of these excuses if the cops search (and they will, believe me) and find that you're already in possession of steroids. Additionally, this is like a one-time get out of jail free card. If you get popped, and this gets you off, it's not going to work a second time. Don't look a gift horse in the mouth by pushing your luck.
When you finally open the package, check the contents carefully. Are all the vials or ampoules intact? Is there any evidence the box has been re-packed after it was inspected? Immediately inform the source if any of the shipped items are damaged; this is unacceptable. The source should be a good businessman and replace the lost items -- if he doesn't then, just don't repeat your business with him. This is a very competitive market and there is no excuse for poor service.
Destroy the box and all shipping receipts when you are done removing the gear. By destroy, I mean burn, putting it in your garbage isn't going to cut it. At the same time you are destroying the physical evidence, go back and delete all relevant data off your home computer using the deleting programs I mentioned earlier in the article. You do not want a price list, tracking numbers, and some western union numbers lying around on your hard drive if someone does come knocking on your door with a search warrant.
If you want to keep the source's price list or some record of the transaction create a single document, write all the relevant information in that file, and then, using PGP, encrypt that document. Store that document in a folder that is easily accessible and be prepared to delete it at the drop of a hat. The best place to keep all relevant information about a source is right between your ears. The second best is behind a hardy piece of software protection.
It's Not Over Until It's Over!
Just getting your precious juice was hard enough wasn't it? Did you think you were finished being all super-secretive. Nope! These are drugs that will land you in jail and or prison if you're ever caught, so leaving them in your medicine cabinet is a bad idea. Do you have a nosy roommate, girlfriend, mother, or friend? Can you see the enormous potential for trouble if a jilted girlfriend knows you keep 10 bottles of illegal steroids in your medicine chest right next to the toothbrush?
If you're a serious juicer, and by that I mean that you're taking steroids several months out of the year, a floor safe might be a good investment. These are virtually undetectable and you'll know your gear is both safe and VERY hard to find. In reality most people are not caught because of steroid related offenses, but rather as a byproduct of other legal problems. A lot of dealers cross over into narcotics, cocaine, etc. and get caught and role over on their steroid clientele. Some guys get into fights with their girlfriends or just have their music on too loud during a party and the police get called.
What happens next can be the beginning of a nightmare. First of all, you should never ever admit a cop into your home or permit them to search your car or house without a search warrant. You have no obligation to cooperate with the police. The police can force their way into your home or car if they have either 1) a reasonable suspicion that person is involved in some criminal activity, or 2) they have probable cause that a crime has been committed and that person committed it.
The first is called a "Terry" stop, and it permits a brief investigative detention. If the officer has an objectively reasonable fear for his safety, he may do a "pat-down" search for weapons only. Now that might included a razor blade, so this can get invasive enough to make you empty your pockets. Also, anything they can "plainly feel" to be contraband, usually drugs or a weapon, can be seized. If you let a cop into your home, you are making a big mistake because they will be scanning every inch of your home, looking for something that they can use against you. You should always, politely, refuse to permit the police to enter your home. If you want to speak to them, step outside your home and close your door behind you.
Frequently the police use a tag-team method of "talking" to you which means one guy is pumping you with questions hoping you will get nervous and say something dumb and the other officer is looking around your home or peering over your shoulder trying to discern something they can use to force their way into your home. If they have a warrant they are not going to bother asking, in fact, by asking they are effectively showing that they do not have the needed "probable cause" to conduct a search without a warrant. Hopefully you know that a search without a warrant is a violation of the Bill of Rights and can lead to suppression of the evidence obtained in that search.
Besides being nice to your girlfriend and keeping your noise clean, the best way of avoiding unwanted trouble with the law is to learn to keep your mouth shut and not to be intimidated by police. Never think for a second a police officer is on your side and if you are arrested, police have no obligation to tell you the truth and no legal authority to cut you deals; only the District Attorney can do that. So, if you get into trouble, keep your mouth shut except to say "I want to talk to an attorney!"