Hrmmmm...
Isn't any exposure a band gets a good thing?
I mean, is it really a bad thing if someone posts a bootleg version of a new tune on You Tube?
Think about Metallica a couple years ago.
They played a couple at-the-time unnamed new tunes prior to Death Magnetic, which were leaked on You Tube. They were decent tunes and that got the hype going for the new disc.
Is someone really going to not buy the new PT if they first see / hear a tune on You Tube, regardless if the song / quality is good or bad? To me, it could only help, not hurt.
As far as cameras, I can see how the flashes could be distracting.
I dunno. It just seems to me as a performer, its something that comes with the territory of performing live.