A follow up:
I talked to the Agent in the CRC later. She admonished the guy twice to quiet down. She was one step away from calling the police when he left.
This isn't as bad a behaviour as I have seen. Once, at the A-17 club, somebody was taking his buddies up to the CRC two at a time as guests...coming down for more. I couldn't believe that the gatekeeper wasn't recognizing this. They were all waiting for a flight at A-18, just using the club for drinks.
Marc
PS I sure hope they never allow cell phones in flight....there would go any hope for peace and quiet.