Newark P4 roof level - 10/5/13
I was pleasantly surprised here. A small group of us headed up there for a few shots after leaving Family day. Within 2 minutes after we arrived there, a routine security patrol drove up onto that level...and drove right past us. They did a few more sweeps up and down the aisles before disappearing without saying a word to us. In total we stayed up there for about 30-45 minutes with no problems.
Disclaimer: The experience shared here was on the day of a public event at Newark. There may or may not have been an amount of leniency offered by security to enthusiasts/photographers because of this event. Newark has historically been generally unfriendly towards spotters, and this experience should not be taken to mean that this environment has changed.