I have friends who work for UPS, FedEx AND the USPS, and all of them tell me that they deliver more meds each day than a person would ever believe. I mean, it's pretty obvious what's in that plastic-bag of an envelope that US docs often use to ship large bottles of pills. And, that rattling sound they make is pretty obvious to anyone with half a brain. Fortunately, i've been told that the vast majority of delivery people couldn't care less what you're receiving as long as it's not a danger to them when they deliver it. They have far too much to deliver already and taking time to harass people over products they very-well may have legit reasons for ordering just adds to their already too busy day. People in the package distributing/sorting rooms might be another story, but I wouldn't worry too much about the delivery guy.