It would also double the cost of a trip. A better and cheaper solution would be to register all Muslims, and strip search every one of them before they board. Then, place a limit of 4 adult Muslims per plane.
A better and cheaper solution would be to keep all muslim-islamist-arabs off of all planes. No muslims. No terriorism. No exploding planes.
Good idea, punish the perps not the innocents. I would go a step further and forbid any muslims(registered) from flying. Let them take a boat or drive to their destination. We are going about this all wrong. If they want to fly again let them clean up their death cult or disavow it altogether.
In the long run, the cost of the trip would be less because you're moving the same load but in a manner that allows you to take advantage of the different cargo types.
It's unfortunate that our present passenger planes are designed to carry baggage AND passengers.
To quote the comic Blake Clark: "What does TWA stand for? Travel with Arabs? Terrorist with Airplane? That's why I fly on Delta. Don't Even Let Them Aboard!"
Another solution would be to segregate the passengers into "Muslim" and "Otherwise", and put them on their own plane. That way, if they blow up the plane, who cares!