This happened at a small office, nothing dramatic. We had a shared fridge and one microwave, and someone kept taking other people’s leftovers. Not whole meals every time, more annoying than that. Like half a portion missing, or the good part gone, or the container put back like nothing happened. Everyone complained, nobody ever caught the person, and management did the usual email about labels and respecting others. It kept happening. I got tired of it because it was always my food that went missing, probably because I cooked things that smelled good. I did not want to do the classic laxative or hot sauce thing. I just wanted it to stop. So I started packing my lunch in the most inconvenient way possible. I bought a set of tiny containers, like the kind for sauces, and instead of one box of food I split it into six or seven little ones. Rice in one, chicken in another, sauce in two, veggies in another, and I taped all of them together with painter’s tape so it looked like a weird brick. On top I wrote very neatly: If you open this, you have to re-tape it the same way. The next day I came back at lunch and the tape was cut and the little containers were all scattered in the fridge, but nothing was taken. The day after that, the whole taped brick was still untouched and exactly as I left it. After about a week, my food stopped being targeted completely. I think the thief was not brave, just lazy, and my lunch stopped being an easy win. It was petty because it was extra work for me, but it worked without poisoning anyone or starting a big office drama.