No, its just as illegal to get seeds mailed to you as it is to grow. However, if you have the option of shipping it else where, why wouldn't you? Just in case? And seriously, ordering 1 seed? 1 seed, 10 seeds, pretty much anything under 10000 seeds is all the same so you might as well get a few if your doing it.
If you arent growing legal I wouldnt order anything to my house. Before it became legal in my state I would order them to a girlfriends house or a trusted friend last thing you ever want is a nosey neighbor or thief going through your mail or snooping around your house.
Also, why would u ever order only 1 seed? What if its male? Even feminized seeds occasionally are male or herm. You gotta get a few. Don't order only 1. Get a forest of marijuana!