Try to bring a dangerous weapon on board a plane... I'd like to see what happens to you.
No vance, you don't do that. But the point is - if you can save even one life by doing this, why do you have a problem with it? If going through a little inconviencne at the airport could save the life of an entire airplane, even if an attack will happen once a year, why do you have such an issue?
As for the old women, here's one article from a quick google search: Tag: old woman drug smuggling - Rynski's Blogski
I hear about it all the time from the IEAs who work near the borders though. They have these old women doing these things because they think no one will search them, like some of you would like.