I cut some length off mine then took out the ball valve. Took an old tap handle and took the threaded rod out and used that in the sanke with a couple washers to make a unique tap handle. I have not heard of many other uses though.
I cut mine down a little and keep it in my truck for emergencies like maybe if I need to whack some carjacker in the head or something. It's easier to explain than an 18" section of 5/8" re-bar would be. It won't rust and possibly stain the seats either.