I've flown several times in the recent past with pipes, tobacco, pipe tool, pipe cleaners and small box matches in my carry-on
luggage with no problem. These are usually in a back-pack, in a toilet kit besides the one that I carry with my toilet gear and
prescription and other pills. No problem with the pipes or pipe kit. They are readily identifiable on x-ray as tobacco pipes, and the gear
that goes with them, logically, has not raised concern. I did get stopped once about my harmonica which, because of the
row of reed chambers, suggested a pistol clip. They saw the harmonica and no problem. I didn't threaten to play it.