@lowqualityfacts Back in the 50's, French customs inspectors were allowed to skim any bulk goods for "quality control" as a job perk, so they just got in the habit of grabbing stuff even if they didn't really know what it was.
So shipping early computer programs to Europe on punched cards was super unreliable because the customs inspector would randomly grab a couple of cards to take home at the end of the day.
@lowqualityfacts they usually keep the biggest box for themselves, that's why sending a fistful of sand in a large package is a tradition in many places