2 observations. About 5 years ago I traveled regularly ORD/DFW/Wichita Falls, TX. Leaving Wichita Falls there was no security. You went through the detectors as you entered the concourse at DFW from the tarmac. In asking, since the airport was so small there (there were several others in the area equally small-Lawton, OK rings a bell) they didn't bother--figured that with the biggest plane being a 30 seater they didn't need to bother. Second funny story was back when I worked for Kentucky Fried (yes, I was a chicken checker--have to tell you about it in HNL) I carried 5 instant-read thermometers (the kind with the 5 inch point that chain restaurant people use) and an instrument (refractometer) that measured the percentage of sugar in a solution (soda). The instrument looked like a gunsight--you looked through it. All this was kept in a case on my carryon. Frequently I got strange looks, but the only time I had a problem was in Tallahassee, FL around Christmas. In the rental car I found a paint scraper/putty knife (painter's friend) that had a pretty wicked looking hook on it). I stuck it in my bag and forgot about it. When I got to the airport, they found it and insisted that I had to check it. It really had no value to me, so I said "keep it!" That really sent them into a tizzy!