I think the more items the TSA puts on the verboten list the better because with each and every item added it becomes more and more clear, even to the Kettles, what a dog and pony show the TSA truly is.
Actually, I'm liking the idea of no carry-ons at all better every day. Force people to check all their luggage, pay the fees and have their stuff stolen - air travel will plummet and the airlines will finally say "enough, already" and that will spell the end for the TSA.