Now, I understand (I think) the idea here. Typically, the act of wearing headphones in public sends a clear "leave me alone" signal. The "Talk to me" sticker would come into play if a person was open to chat despite the fact that s/he was wearing headphones (In fact, the stickers were born as a result of Marco Siebertz's senior thesis exploring the social implications of using headphones, specifically as a sign for non-communication). An interesting idea, but I still think that the same result could be achieved through other means, like eye contact, a smile or, heaven forbid, actually turing your darn iPod off for a minute or two.
[Via The Blog Herald]