I bought a Frididarie fridge that included a lock.
Years ago when I ran another company, my office door was always open. I kept a dish of Candy/Treats for guests on the small table between the two chairs in front of my desk. This Candy/Dish would empty out often in two days with no visitors, employees only coming in when I was away.
I purchased some homeade "Trick" candy at a novelty shop. This lady made homemade lemon drops with a garlic oil center. They were vile. I loaded up the dish and waited. One morning my accountant was the culprit. He came in snarfed some candy and went back to his office. I was watching outside the door. He was sucking away, working, and he begin to get the slightest bit quizzical look on his face, but continued working. He then got a pretty serious look like he was going to poop himself right then and there. He goes bolting out of the office past me and into the bathroom and is running the facuet with his head stuck down in the sink trying to irrigate his mouth. Priceless. You could smell the garlic coming off him from ten feet away.