They're NOT liking things that can be used like a bat/club these days. I bought a CARDBOARD SHIPPING TUBE (the 1/4 inch walled kind, not the cheezy thin fedex kind for documents) with plastic caps. 6 inches in diameter and 44 inches tall. Cost me like 10 bucks (cheep insurance for a stand I paid $125 for). I pack bubble wrap on the bottom, and top, and seal with shipping tape.
I stick my Norman stand AND Bogen monopod in, and CHECK IT...
Comes thru with flying colors every time. If you've got a decent size stand, I STRONGLY SUGGEST you look at something like this as your FIRST OPTION. If they DON'T let you carry it on, they'll make you check it, and just put a tag on it, AFTER MAKING YOU SIGN A DAMAGE WAIVER.
My Norman stand was puchased in S.F., for Dead New Years, after "Deadhead Express" (Peoples Express - GOD am I showing my age) broke it on the Newark to SF flight in '85.
**side note - for you young'ins** Peoples Express was one of the first No Frills airlines around. $99 each way from Newark to SF. They used to put an EXTRA FLIGHT (actually, they rotated an extra aircraft for maintenance) on, Dec. 26th, to cover all the 'heads flying out for New Years. IMAGINE - a 737 that's 90% deadheads! Boggles the MIND, it does...
Rick