I've made the book mistake a couple of times. When I immigrated to a new country, I had brought along several small carvings and ornaments that I liked to display on my shelves. Each was wrapped carefully in newspaper, but the TSA was not a big fan of that. Went through security at two different airports and had to stand there awkwardly while an agent unwrapped every last item and nodded in amusement over the peculiarness of each one.
Funny enough, I would bring bottles of assorted (mostly non-prescription) pills on each trip and they never batted so much as an eye at those. Could have easily been smuggling in MDMA for the better part of a decade.
I'm on the opposite end of this. Seems every time I reach out about an item I'm either ghosted, or the person sold it ten weeks ago and couldn't be fucked to take it down. I think people are just inept in general, as several years in Customer Service revealed to me long ago. I watch people whip left turns onto busy streets without so much as looking nearly every single day. The general populace is pretty low-functioning, and they're out there raising kids and making important decisions.