Hmmm ... I think most of the dead batteries are in the heads of TSA personnel. Their goal does not seem to be to catch terrorist -- by their own admission they have pretty much failed at that. What they DO do is get us used to the idea of a police state under the guise of "patriotism". If we don't support their actions, then we're not "patriots" and are therefore, by definition, close to being terrorists. This technique has been used for decades by many different governments, including Nazi Germany, and it seems to work quite well.
Meanwhile, our personal rights and freedoms dwindle daily.