Nope. By disturbing all the people around you with a bright screen, you prevent them from capturing the real concert right now they want to see without a flickering screen in front of them.

And personally I can record, or enjoy the real moment. But most people who record with their crappy smartphones probably just want to get the virtual recognition after they shared their videos, they were there, "like", great. But no one I know, actually watches shaky crappy smartphone concert recordings.