"To the ignorant person who stole my lunch between yesterday and today:I'm not making these up, nor encouraging the creation of the notes, or instigating in any way. Just documenting.
I just wanted to let you know that I have strep throat and you'll notice that I had partially eaten the food. Don't be surprised if you get sick. I'm sure the visit to the doctor will cost more than would have paid if you bought your own lunch as opposed to stealing someone else's.
Also, since you're such a genius, I just wanted to remind you that what you did is stealing and it would be a shame that you'd lose your job for being a thief. ON second thought, it wouldn't be a shame; it would be great.
Merry Christmas and Happy New Year to you and your family!"
Anyway, I created a Public Flickr group for these sorts of things: Furious Fridge Notes - Lunch Thieves, Beware!