I will add that I always carry the phone number of the PC at EWR (my 'home' airport) in my cell phone. Occasionally I run into a less-than-cooperative agent and have to call the PC for help. They typically ask you to put the agent on the phone. If the Agent refuses (this really does happen), the PC then asks for the ID of the terminal the agent is at. The Agent has given me this in the past. In about 15 seconds, my gate pass pops out of the printer. The agent at this point, just hands it to me, although it is quite evident he/she is pi**ed.