I was thinking the same thing when I saw this come up on youtube.
I am guilty of taking a quick picture during a show, usually at the beginning to remember where I was via the stage, sourroundings etc. (mind seems to forget things lately).
How can it be fun holding a camera up for a whole song?  Rarely is the audio good either.
I found it annoying at the Waterfront shows.  I hope it becomes just a passing trend?
Maybe a seperate section is a good idea - I do scan for them - and watch the beginning - sometimes they are good.
And some become rare special footage.
Guess I will wait and see what the future brings.  Lighter pictures on our phones?  At least my thumb won's burn. :)