> only an idiot would try that again; there are targets with far higher value (and probably much more exploitable security flaws) if someone wanted to send a message again.
Specifically, the large gatherings of tightly-clustered people waiting at a security checkpoint are much more vulnerable than any plane full of passengers.
The number of times I've wanted to find a non-harmful way to prove that point (smoke grenades come to mind)... but the risk to me is not worth it, and all it would do is introduce some sort of pre-security screening that completely fails to solve the problem.
Specifically, the large gatherings of tightly-clustered people waiting at a security checkpoint are much more vulnerable than any plane full of passengers.