Just to play devil's advocate, I would have two things to say. First, I would say that even though the chances are slim, customs is not the only government agency that has jurisdiction over the mail. Any package sent through USPS could potentially be opened, and if the package is crossing state lines it is still just as illegal as ordering from overseas. Secondly, on the website it says "Evey Order is discreet shipping" (sic), and that would imply to me that there is a little bit more stealth than the usual discreetness that ALL letters inherently have. If all he's doing is dropping them in flat rate envelopes, that doesn't really warrant an advertisement of "discreet shipping", maybe he should change the wording to say "Every Order is regular, non-stealth shipping, (which should be good enough since you probably worn't need stealth"