Artist Eric Daigh uses red, black, yellow, and blue push pins to create photo-realistic art portraits. His work really takes advantage of the "realistic far away/geometric up close" phenonomenon that happens with "pixelated" art. I love the variations in distortion that are visible in the above photo.
Using a push pin is sort of a visceral experience - the tack is sharp, and the corkboard is just resistant enough to get a satisfying squish as you impale your document to the wall.
Really...just try it.
So I say, embrace it, and whip up some push pins that resemble something using for serious sticking. You know, like a samurai sword.