I know a lot of you will disagree with me on this one, but ... I'm Team Lady with Camera:
At a concert, Adele singled out an audience member who was filming her, saying:
Yeah, I want to tell that lady as well, can you stop filming me with a video camera because I'm really here in real life. You can enjoy it in real life, rather than through your camera. Can you take your tripod down? This isn't a DVD, this is a real show. I'd really like you to enjoy my show because there's lots of people outside that couldn't come in.
I'm assuming the woman didn't really have a tripod, and Adele was being sarcastic; obviously, I'm against tripods! I'm also way against gigantic iPads being held aloft.
But for quite a few years now, it's been acceptable at concerts for people to film bits with their point-and-shoot cameras and/or their smartphones. At some point, maybe 10 years ago already, most professionals behind the scenes realized that the days of bootlegging were over and filmed bits all over YouTube was free promo, enticing those who could to go to shows, allowing those who could not to enjoy portions and maybe get psyched up enough to buy merch or the eventual DVD.
Most acts I've encountered (barring some old-school ones, like the Go-Go's at one show in Dallas a while ago) and most venues (barring, again, some old-school venues—Chicago Theatre springs to mind!) now just accept the incessant filming.
I am sympathetic to people who are bugged by it, so when I film anything (always with my point-and-shoot, so the illuminated screen isn't jarringly huge) or take pics, I do it directly in front of my head, and never over my head (blocking people's view is not cool).
Also, I kind of think it was mean of Adele to single the lady out. She's probably embarrassed, even though a huge % of the people around here were doing it, too.
On a tangential point, people have a right to stand and dance at a concert, but arms in the air over your head is just fucking obnoxious to everyone behind you.
So have at it: Is it okay to film at concerts?