I was standing in line at Sea-Tac to go through sec. with my two 7wt rods in rod and reel tubes, one four piece, one three piece, when a TSA guy came up and told me I couldn't take golf clubs on the plane.
I just looked at the guy, with the your stupid go away look, and he did.
I don't fly often but I've never had a problem carrying on my four or three piece rods