I find these "band rules" very strange, too.
I have gone to five Eagles concerts over the last year in four different venues and never, at any time, was I ever chastised for standing up. In Birmingham last week there was a couple on the front row who stood up & slow-danced through both of Timothy's ballads!
As far as cameras go, the guys seem to have gotten much better at allowing pictures lately too--the general announcements before each show usually say no flash photography and no videos. They really do hate the flashes, though. "Frey Eye" may be bad but I have been the recipient of "Don's Deathly Glare" and it is quite terrifying, too!
The guards at each venue really do seem to have a lot of say over how close you get, however. In Memphis the guards wouldn't even allow me to leave my 3rd row seat to give Don his flowers, but I am still amazed that here in Birmingham, the guard personally escorted me to the front row for pictures. Go figure!?!