The answer is: Young tools with Shiny Jet Syndrome.

But seriously, you guys who doubt the security aspect have never experienced that kind of event. A few years ago a crazy guy entered the cockpit of one of our MD80s. There was a scuffle and our FOs was hurt. Stuff happens.

FFDO training is an eye opener. (or so I'm told) There are bad people out there and some if them mean us harm. Don't begrudge those who are proactive and have stepped up. Some are over zealous dorks but most are OK. Just like anything else.