This can barely be recognized by a layperson as a QR code at all. This may be great for steganography — like these US POWs in Vietnam blinking Morse code for "

This can barely be recognized by a layperson as a QR code at all. This may be great for steganography — like these US POWs in Vietnam blinking Morse code for "torture" while being filmed, when their captors don't realize that and pass the video, and the morbid message is later extracted.