Remember most of these ‘press punks’ are reading a monitor for a paycheck and they have to show the proper ‘attitude’ in their reading and body movements, including appropriate ‘conduct’ on and off the set.
Here’s an insightful short funny video by Conan O’Brien about the lemming like behavior of ‘press punks’:
https://www.youtube.com/watch?v=Hh_Kx7UKndI