I fly all over the world and the rules are different everywhere you go. I've had tiny applique pins confiscated in some countries. I have a pair of kindergarten scissors with blunt tips and they go through everywhere. If all I want is to cut thread, they work fine. I have also used a pair of scissors design for cutting baby's fingernails which are also blunt but longer. They seem to be OK as well. I have never had anyone question a needle.