You can't imagine how much I complained about the ticket prices re the O2 (and even previous ones/other events!). You are not alone. I did end up getting several tickets and I wish I had been stronger and done only a few shows but since the concerts were literally round the corner from my house and didn't have any other expenses and found some good people who offered me tickets less than half price, then I did a few more.

I tried to show my disgust towards this 1st by not renewing my Backstage card/membership (although I fear I'll renew for next summer).

Some people have received surveys about recent shows/tickets/etc and have stated how expensive the tickets were and explained we *hardcore* fans are not keen on any sort of packages just concerts with reasonable ticket prices. I hope they pay attention to them in a way but I doubt it.