I would hate that. I'm sure a lot of people, maybe even most people, who legally carry firearms are levelheaded, reasonable people. But some of them aren't. I live in Virginia, a state with looser gun control laws than Texas, and the location of the NRA's headquarters. There are plenty of people here who I would absolutely not want to have a gun on board any plane I or anybody I love was on, because I'd be afraid they'd use it.

Mind you, I don't necessarily think they'd use their guns to do something criminal, but something stupid, like fire it because they thought someone was doing something criminal. Firing a gun on an airplane is almost always a really, really bad idea, because all you need is one stray bullet going through a window and you can kiss the whole plane goodbye.