Flash photography
We were in the cathedral that is Cameron Indoor Stadium. Duke vs. Boston College. An announcement comes over the PA: Please do not take flash photographs inside the stadium.
The last time I heard a similar announcement was in the Sistine Chapel. Signs at the entrance requested -- stated clearly, actually -- that flash cameras were not allowed. The hall was jammed with people, so many that it was hard to move. Guards routinely and forcefully announced that people not use their camera's flash. People routinely and blatantly ignored them. Guards responded by shining the rays of laser pointers into the lens of the poised cameras. People turned away, not sheepish or even furtive, and framed another photo.
I don't know if it occurred to the amateur photographers that they could get better photos of the same masterpieces at the gift shop.
In the Sistine Chapel, I figured the scofflaws would get their reward in heaven. At Cameron, I guess the violators just got tossed.