Oh, I totally get that, trust me. I'm just more concerned for the ramifications of eating a tuna sandwich that had sat around for one or two weeks. Tuna doesn't keep all that well.

I used to work in a warehouse, and one of the women in the office was telling me about how someone would go into everyone's lunches and eat their desserts. So she did the old Ex-Lax in the brownies trick and took it to work. Come lunchtime, someone HAD eaten her brownie. So she put another one in the next day, and the next. Then her boss was out with a "stomach bug" the day after. Her deserts were never stolen again. HA! That said, when I worked there I used my staple gun to seal up my brown bag lunch every day.