Yeah, that's right, I'll just open the package from DLASK at the post office, whip out the AR-15 from the packaging, attach a secure locking device to it, place it into a secure container, and as I walk out the door of the post office be taken down by the local tactical unit because some scared sheeple called in a "crazy man with a machine gun"? Then I'll have all my guns taken away while they "investigate", be banned from the post-office, and spend some time in a holding cell before being charged with scaring the public and having to spend time and money for my defence. Then I won't be able to deal with the emotional trauma and fall into depression, and then not be eligible to own guns no more.
Thanks, but I think most people here will take their chances by just taking their parcel home as any other parcel, regardless if the contents are firearms or not.