Bringing cameras into arena shows is usually a no-go. The rules concerning cameras posted at the United Center Web site indicate that cameras are allowed for sporting events but not for concerts and family shows. I assumed this meant the regular cameras since most cell phones have cameras in them, therefore, I left my regular cameras at home.
Venues sometimes relax the camera rules if the band(s) playing are cool with it. What's strange in this case is that I assumed it was a band rule as well since "no cameras/recorders" was printed on the ticket. That was not the case the night of show since many there were taking pics with regular cameras.