I was at a Maximo Park gig this week and with everyone recording and taking pics, I was thinking how do acts on the stage cope when you have all and sundry using their flash every other minute, specifically those with photosensitive epilepsy.
Have you ever been to a gig where the artist tells you not to take pictures because of this reason?
I can only recall Ian Curtis from Joy Division having epilepsy but it wasn't triggered by photosensitivity.
I'm assuming if there are any then they'd do the show blindfolded or something. I would expect even no photos were taken that the stage lights would be enough to trigger a fit. It would be very difficult to enforce a total ban on cameras and orchestrate the stage lights to not cause problems.