The following story is disgusting and if you are sensitive to that sort of
thing, please don't read any further.
Where I used to work, people dealt with food theft in unkind ways. When I
first started there, a guy was stealing another guy's lunch every day and
eating it. Finally he had enough and made a "special" sandwich for the
thief. He carefully toasted the bread and spread a filling of dog droppings
between the slices. As usual, the thief stole the lunch, but when he bit
into it, he got sick and ran down the aisle making retching sounds.
Another time, a group of guys had a doughnut club. They would take turns
bringing in doughnuts for the group. A non member regularly waited until no
one was around a stole a doughnut. One day, the group had enough, they
warned all of the club members and filled a jelly doughnut with the ink that
machinists use to mark parts. ( I can't remember the proper name for this
ink - For some reason, Prussian Blue is stuck in my head, but I can't
remember if that is what it is called. Senior moment) Anyway, to get back
to the story, the guy got a mouth full of this ink which ran down his chin
and made a stain that would not wash off and left a taste in his mouth that
would not go away. He tried to file a formal complaint and get the group in
trouble, but fortunately the boss basically said that he got what he
deserved. The boss, did however, tell the group that they had gone too far
and not to do something like that again.
There were other "punishments" for different offenses, like when someone
drilled and tapped a hole in the side of an offenders toolbox, installed a
zerk fitting and pumped 5 gallons of grease into the tool box. Another time,
they picked up a guy's toolbox with a hi-lo and welded it to a column 15
feet off the ground. Fish or skunk scent were put into toolboxes over long
summer weekends resulting in unbelievable smells.
I could go on, but you get the idea. Actually, it was not that bad a group
to work with, and we actually did do some work, sometimes.