And they aren't going to cause the instant death of anybody with a bowling trophy, either. Remember where this discussion started? Me pointing out that the TSA is crowing their safety record and celebrating their vigilance in confiscating a retirement gift from an NFL coach. Not "turned away" not "didn't let on the plane" but confiscated... and posted pictures on their blog... to show how safe they're making the world. Again, and I cannot stress this enough, these are the chucklefucks that spent $160m on pornoscanners. You can be "almost certain" all you want, they are incompetent buffoons that have not, by any applicable measure, accomplished a single fucking thing. http://www.politico.com/magazine/story/2014/01/tsa-screener-confession-102912People aren't going to cause the instant death of 5 nearby people with a dry ice or a lithium ion explosion, and setting those things in motion is a very clumsy and hard to pull off sort of thing within the compartment of an aircraft.