More security shenanigans

You know the set of stairs that are on the end of the jetway as you're walking onto a plane? Well, while I was walking through the tunnel from the terminal to the plane yesterday I saw someone go out the door onto the tarmac.I also saw the numbers they typed in to unlock the door.I'm not going to write it out here, but it's a five digit number that starts with 1 and ends with 5.Seriously?This is how we protect planes?Maybe BNA should take a look at the security protocol for how things are set up... ?