Well, if you're taking photos at a concert...
...you DESERVE to get rubbish pictures.
I'm getting sick to death of people at public events, be it concerts, sports events, or even at the bloody cinema, who feel that the event didn't actually happen unless they took a photo of it - or preferably, a long video of it.
If you're watching it through a phone, you're NOT actually watching it. If you then play it back, all you're doing is playing back a reminder of you watching the event through the phone.
Oh, yes, of course, once you've taken the photo you've got to tweet the damn thing to everyone.
You're at a concert, or a sports event - a once-off event which will never happen again exactly like that. EXPERIENCE IT! Don't record it. There are TV cameras and official videos which will record it a fuck of a sight better than your stupid little phone.
Oh, and contempt multplied by ten for anyone taking photos at these events with an iPad. (It's always an iPad - never any other sort of tablet...)