I don't. Unless I am preparing to board a private plane.
I go to the airport all the time without going through security. They even have a decent resturant there. I don't get searched unless I have a boarding pass and am proceeding to a gate. The gates are private property, leased by the individual airlines.
Try again.
Go back and have a look at the .pdf I linked to as (from my brief scan of the TOC) it appears to discuss case law with respect to transportation-related issues.
I may look at it tonight if my wife and kids don't have too much loaded on my plate.