Here's a friendly word of advice; don't steal your coworker's food.
This story of due comeuppance comes to us from Petty Revenge
. And honestly this might be the best example we've seen yet. Our OP begins by telling us about the hunch they had that their coworker 'Megan' was stealing chocolate that was clearly marked with a name other than her own.
Megan only worked a few days a week, and the chocolate would mysteriously go missing on each of those days. But still, concrete proof was needed. So our hero does what any petty artist would do and brings some good old fashioned laxatives into the mix. Literally.
Two batches of delicious brownies were made and brought into the office. One batch with laxatives and one without. Guess which batch was labeled? Of course Megan took the bait. Now we wait...and trust me, they didn't have to wait long at all.