Ok, I haven't checked through this thread to see if this is covered, but it is 20 odd pages long so I hope people forgive me if I'm going over old ground.
I saw that the review on the front page of coldplaying.com stated that it was ludicrous that you couldn't wave flags. I'm sorry, I think that's totally correct. I'm not a boring person at gigs, I was the first to stand up in my block, sang at the top of my voice, and absolutely loved it, save for one thing. A really quite annoying girl in front of me waving her flag in my face. They genuinely ruin it for everyone behind them. You can enjoy the show the same without waving a flag saying 'viva', with the ridiculously hope Chris 'might' see it. He's 100 metres away for god's sake. Just enjoy the music. I did, and had the best gig of my life!
Again, apologies if I'm just repeating what's already been said.