Yes, alright, realistically we can't lock up everyone who exhibits a complete lack of common sense, but that doesn't mean it isn't fun to think about.
Seriously, despite the general sham that is airport "security", the presence of the word "might" in this woman's offhand remark about a bomb in her bag is not a mitigating factor. I guess by that standard you could remind security at the White House tour that you "might" being trying to assassinate the President. And don't forget to tell the cop who stops you for speeding that you *might* have a gun in the car, or perhaps that you *might* have a dead body in the trunk or something similarly witty but oh yes, quite "true".