Originally Posted by
LarryJ
They may have been angry that they weren't able to use KCM, for whatever reason, and took out their frustrations on those around them.
A percentage of KCM screen-ees are selected randomly for additional screening but if that involves going through a passenger screening lane we are escorted to the front of that line by a TSO so that doesn't sound like your situation. Could be that the KCM system, or their airline's connection to it, was down. That happens occasionally.
No one escorted them to the front of the line. They just apparently decided on their own to bypass all the customers and shove their way in without even attempting to say "excuse me."