Well, I'll throw in my 2c here...
I would LIKE to be able to take pictures anywhere I want. However, that CAN infringe on others rights and I must show respect for 1) the law, 2) the rules set within private property, 3) other people's rights to privacy, and (most importantly!) 4) common human decency and respect for others.
So, IMHO they have every right to demand and expect no pictures be taken...and the right to sue should someone violate that agreement (most likely made upon the purchase of the tickets in the fine print). The newspaper is out of line because it is literally asking people to violate the 'no photography' agreement. What a bunch of hacks...if they are that concerned about breaking the rules they should sneak their own photographer into the concert to take pictures. Of course, I would hope that individual would be sued afterwards along with the newspaper...or better yet caught on the way in and tossed to the curb.
How hard is it to simply follow the request of "I don't want you to take a picture of me?" I know there's all kinds of paparazzi out there that make a living off this, but I don't respect what they do. I know that public figures and people simply in public have less of an expectation to privacy. At the end of the day, where's common human respect for others?
Ok...there's my rant