Why are you people jumping through hoops to cary scalpel blades and dental flosss? You are not going to crash on a mysterious island with a mysterious storyline ( I gave up on that show after 5 episodes. What WAS it all about?)
Check your normal kit in baggage or mail it ahead of you.
Airlines are private corporations. If I climb into your car and refuse to buckle up and start playing with my survival rifle-et, are we going to debate on philosophical grounds?