oh no that sounds awful! nothing worse than rude people at concerts, can really spoil it... at the concert i was at last tour, some english guys were incredibly rude to me in the front section - they were just being obnoxious to everyone, it was awful, but when they realised i could understand exactly what they were saying, and i answered back at them in english, they started being really nice, but i wasn't gonna make friends with them after that... kind of spoiled the experience though...
i got in line at about 2.30pm and was just really lucky i guess! the queue was a mess - really random and people just bunched up sitting on the pavement, so i just chose a spot and sat down... was a really long wait though - i would recommend taking a cushion or something to sit on as my ass was in agony haha
the people all around me were wonderful, all really really nice and friendly, and people would come and go out of the "queue" for food/drinks/toilet runs etc. and didn't seem to have any problem getting back to their spot - it was the same in the inner circle as well - lots of people coming and going the whole time before the show... if you've got someone to keep your spot you should be fine...
i was worried about being squished against the rail too, but it was absolutely fine... it was so nice to have the rail to prop me up as i was exhausted before i even got there... but energy levels lifted once the music started though... i was a little to the side, so there wasn't a crush around me at all - the rail in front of the stage/Bono's mic looked pretty squished though...
also, once you get into the inner circle and grab your spot you must sit down otherwise it would get really really cramped in there if everyone is just standing... everyone around me was sitting, and then when everyone stood up we weren't packed like sardines... sitting down also makes it extra difficult for the pushers-in to get past...
the security were absolutely adorable as well - they let some folk peek at the setlist before the show even haha! and they kept handing out bottles of water to us all... being so close to the stage was lovely, and made it feel like an arena gig... being short was tricky though as the stage is quite high for shorties and i couldn't see The Edge, only when he whizzed over my bridge once or twice, and could just see the top of Larry's head... Adam was right in front of me smiling away just about the whole time which was lovely, and Bono was mostly front of stage and out the back, but i had a great view of him when he was at the front... it was so nice to "see" them performing up close and not have to just look at the screens... the energy was incredible! Bono was a real live little dynamo! really giving it his all! was lovely to see! it's really worth doing it if you can... but be prepared and wear comfy shoes you can run in and clothes you can sit and stand in easily... it was my first time on the rail and it was a really really wonderful experience...