As for Green Day, dude, Gaz, I think your problem was that you had high expectations of a concert that promoted an album that was entirely based off of invoking Orwellian dystopian imagery at every possible opportunity.
Uh... no it wasn't.
It was because it was a choreographed performance which had virtually no heart in it whatsoever. Everything, from giving a kid a guitar, to the super soaker, to the crown for 'King For A Day,' right down to, somewaht embarassingly, the encouragement to 'be an individual,' was rehearsed and regurgitated from the previous year of the Idiot tour.
What's more, I'm all for crowd participation, but at a certain point you have to say enough is enough. 'King For A Day' went on for like, nine minutes, and I just got sick of him chanting with the crowd. I came here to listen YOU sing, dammit, not the fat chick next to me.