Yes, the "3-1-1 restrictions" are completely retarded. Yes, people are mostly liquid. Yes, batteries are dangerous. Hollering about that here isn't going to help you, because the TSA people live in an entirely different universe than you do. To them, the 3-1-1 rule is perfectly rational. It's a reaction to an actual threat they had. To abandon the restriction, they have to accept responsibility for the next time liquid explosives are used to destroy a plane. They are never. going. to. do. that. It would be irrational --- from their perspective --- for them to do so.
This TSA response isn't disingenuous. It's exactly what any thinking person expects them to say. So what are we discussing here?