I made this for Wil Wheaton, finally got it to him and finally am getting around to adding it onto here. I made it to give him at PAX East, but he wasn't there! So I had to wait until PAX Prime.
I used his blog Sprite Art as a map and made the QR code in an online generatore. For people who don't know, QR codes are a matrix barcode. Typically, it's a collection of black squares on a white background, tho any highly contrasting set of colours may work. I've seen black on pink for example. Each square and its location in relation to the other squares is translated by a barcode reading program as any sort of data, EX alphabet, number or kanji. It was originally invented for Japanese automotive manufacturers to use but is now found on many things.
A common use is its addition to pamphlets and information sheets. A frequent use is to encode a web address that a phone app can then read and you can choose to open and save in your phone browser. It's a pretty amazing way to transmit large amounts of data swiftly and through limited print space.
I applied it here, with full geek use, to say "Don't be a dick."