lol, I was probably the only person at that show that didn’t use a flash. over the past five years or so, there seems to be a gang of folks with dslrs and flash units and those diffusers that look like tupperware at every show i go to. I’m sure some of them are for the local press/blogs/promotions, but i suspect a lot of them are fans, either with aspirations to “make it” or just hobbyists.
I’m honestly not bothered by the flash as a spectator, I take it as another aspect of the performance. as a photographer I used to get cool shots in b+w with a handheld flash, but in color it really destroys the look of the performance. either way, if I can get a shot with available light, I use it. the flash destroys how i’m composing with my naked eye.