Perhaps you missed the wink?
Some things are more fun when taken seriously. 
…I should make that rickrolling-QR-code tshirt… I even wrote software for laser-cutting QR-code stencils, for purposes like this.
http://shaddack.twibright.com/projects/sw_qr2laser/
…of course it turned out that the thin lines that separate the pixels are confusing some (but not all) QR readers, so the stenciling would have to be done four times with slight stencil shifts, or in a way that smears the pixels to the sides a little.
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