I have the unfortunate luck of being stuck in an airport somewhere every single time something crazy happens, which might be why I take fewer chances than most. Underwear bomber? I was sitting in ORD. Plane lands in the Hudson? I was sitting in CLT. Etc. Stuff like that happens, they end up having extra security even once you're already in the terminal (gate screenings, etc). Plus I used to book flights so close to the flight date that I seemed to be permanently on Delta's extra screening list. Lost a lot of "suspicious" stuff that year for no reason. It has eased up since I moved to Denver but I'm still really cautious.