Actually pipe and tobacco aboard US flights is not a problem at all. It's the paraphernalia that we're trying to caution about. Of course, times they are a changin'....the moment you realize how screwed up it is, that bringing a pipe and tobacco to a flight is even an issue....of course the excessive controls are neccesary in times like ours, yet they make a mountain out of a molehill. It's just a freaking pipe tool, and some dried leafs - unless you're a trained Ninja, you'll have problems hurting anyone with it.