On this note, be careful if others offer to send free samples. Someone in the past here did that to get people's addresses, then extorted them (threatening to mail them drugs and report it to the feds if they didn't pay a certain amount of BTC).
I haven't heard of that at all
It was probably the middle of last year or so. It was a pretty bad situation.
Just did a few search and found this.
How-to receive shipments anonymously
https://bitcointalk.org/index.php?topic=442807.0