Good example of surveillance theater. Let's shame the *occasional snapshot* taking individuals as a way of distracting everyone's attention from the ubiquitous *continuous recording* faceless anonymous "hidden" camera operators (all this black brown silver globes in the ceiling of nearly every store and office/gov/common area building.
For the record, there are very few attendees wearing red, and only slightly more with yellow. The vast majority chose blue. When @caseorganic took a photo of her audience for the live demo, she had to ask one person, and point the camera away from one person. Everyone else in the room had blue.