Milk of human kindness from a machine aside, it didn't even give me change. Stoopid machine. So I left a note, the one on the right. I don't know if it's legible here (the larger size on flickr is), but it says, "This machine just ate $2 without vending anything or giving change. In these troubled economic times, can any of us afford to just throw money away? Don't use this machine!"
This morning when I came in, the pink note had joined my note - "I should have listened. It took my money too!" And when I went back to get a cup of coffee, "I want my 2 Dollars!" had joined it.