Sure signs of Kettledom at the airport:
Walking with a pack of people cluelessly so no one behind you can get by
Not-Walking on a moving sidewalk make me want to comment "Its a moving sidewalk, not a ride at Disney"
Stopping at the top or bottom of an escalator.
Thinks the overhead space above his seat is his personal o/h space

Now what do you call the elite guy standing at the gate reader an hour before his flight so he can be the first to board?