From what I noticed, when a band perform on stage, they perform with a mixture of anxiety and emotions, thus they would probably be too occupied to even bother about distractions from the crowd or the photographers for this matter.
Although it might be a quite offensive to have lights all burst out at their face, it's much more comforting to see that the end product is something that they could look back on, which I think would serve as a lifetime of good memories rather than a moment of displease.
I hope you guys have some common understanding on this matter.
Just my opinion.