I guess that's true I tend to forget that LE is primarily concerned with serious stuff and dealers. I was actually cuffed once years ago by my local LE because I appeared (and was) intoxicated. I live in a major city; all they did was talk to me for 5 minutes to see that I was straight and was an average Joe not a lunatic. Then they drove me home and even dropped me down at the end of the street so neighbors wouldn't see, at my request.
Y'all made a good point about laziness also: the common customs officer stuck looking at boxes and envelopes every day of the week who is used to seeing kilos of serious stuff probably looks at an envelope of pills as a waste of their time and energy. My earlier point was why wouldn't they input the information, but it's probably true most guys just don't want to fill out another form!