pretty much common sense to not carry anything or say anything that involves terrorism or bomb etc on the plane. It is called common sense, and IMO the TSA has the right to question the guy, not necessarily arrest him though. he does need questioning and interrogation.

sometime you just never know with people. who would have thought a high class guy would try to blow up a northwest A330. and who would have guessed a psychologist in the army would kill service members at Ft. Hood.

I mean if the pilots of your plane came on the PA and were announcing there is nothing to worry about, they have only crashed once, you might want off the plane right?