I went to a poker tournament last night where no one really knew each other, and there were 7 people there wearing threadless. There was recognition and understanding in the eyes of the threadless wearers as we met across the poker table. It was unspoken, but we instantly bonded. In a situation that was somewhat socially awkward, threadless proved to be an ice breaker and the initiator of some great friendships.
That's awesome :)