Used to travel with a lighter all the time and they never cared about that either for some reason.  

 My wife somehow got through security with a full size box cutter. Didn’t realize it until she was home. 

 They don't bat an eye at Ideal electrician scissors, but $deity forbid you have a Victorinox pocket knife. The horror! 

 Evidently, airport xray machines cannot see Gerber pocket knives, in my experience.  

 I once had a screwdriver. It's frowned upon, but they let me go and just took my shower gel..  

 Apparently not. 

 One of my girlfriends went through three international airports with scissors in her bag until a tiny regional airport in Belize spotted them.

Airport Security is Security Theater.