Quick-Response

I finally downloaded a QR code reader onto my iPhone, (I'm new to all this smart phone stuff.) and now I want to scan QR codes everywhere. Which works out well since they are, apparently, everywhere.
Oddly, there are billboards, trucks, buses featuring these codes. (How, you might wonder, could they be safely and effectively scanned?)
A Canadian farm created the world's larges QR code in their cornfield.
But my favorite, so far, is the gravestones. Where the code will link you to a mini-biography/obit for the deceased. I think we should just stop putting names and dates on the stones and replace everything with QR coding. Of course if the carving is just a little off, loved ones are redirected here: