Island, That is some photo, do you know what their altitude was when this happened? Seems to me that if it was anything over a few thousand feet, those people would be dead popsicles even if they stayed in their seats. Still, that must have been a scary ride. Free upgrade for everyone after that sucker, no?
As for tasers, they do not always work, in fact they tend not to work when you need them to the most, from what I've heard. And it is true that people miss when shooting in real life, (as opposed to the movies), but if it is a situation that requires lethal force on a jetliner, a hole in the fuselage would be a minor concern. And the shooter is not going to miss 10 times, (or however many rounds he has).