>>If I was on a flight headed anywhere & a threat was made, I would be praying for SWAT (or any other agency) to come through the door with as much fire power as they could carry.<<
Why not carry a couple of wooden pencils on the plane with you. When the opportunity presents itself, shove one through the guys kidney and the other one into his neck. Give him a taste of your threat to his life for disturbing your flight.
I like it!