Used to sit next to a colleague at my current job who would noisily crunch a whole bag of raw baby carrots mid-morning. It was UNBEARABLE. She said she did this to fill herself up so she wouldn't want unhealthy snacks, well she was still overeating! Thankfully, she retired recently so she won't be there when I go back to the office
I once worked in a small branch of Boots that was part of a retail park in a quiet suburb. The store was too cheap to hire real staff, so instead we had a lot of schoolkids on work experience placements, or people on workfare schemes. Many of them stole from the store. The staff would have our bags searched at the end of each day to prevent theft, but that didn't stop them thieving before then. Someone we had for about three months (workfare) would stuff things down her bra all morning, put larger items in her bag during her lunch break, then go to the Starbucks next door where she would meet the same woman for lunch every day (presumably her girlfriend/wife or housemate) who would take her loot home for her! The manager knew all about it and didn't care. She stopped accepting work experience kids from one particular local school because pretty much every one they sent was a thief, but generally she felt the cost was outweighed by the savings of not paying a salary