I'm SOOOOO on-board with this concept. I for one volunteer to sit at the back of the plane with a a PSG-1 and deal with those offensive twits in 1st Class...
all kidding aside, I can't imagine what the statistical extrapoliation of such a passenger list would predict, but I bet everyone would be really polite. As R.A. Heinlein said, a well-armed society is a polite one.