Mad workers in mail offices, in charge of sorting the mail, that loot and steal the packages for their own profit. Their crime is mostly not detected, since the blame can be shifted to sender's poor packaging.
"Be careful when shipping out art during the holidays please! ... Mail junkies are going through the mail and ripping up envelopes looking for gift cards, money etc. But they're actually finding amazing furry artwork instead"
by Bigbeating Kioshi December 22, 2020