Originally posted by MarkJerling Checked luggage yes, cabin - very unlikely.
The part that struck me as being particularly ironic is "I have not seen TSA refuse to permit a tripod which was packed totally inside a carry-on bag (sans spiked feet), but I have seen them refused, packed that way, in years past. In my opinion, it’s not possible to be absolutely certain what a TSA TSO will decide about permitting tripods in carry-on bags in the future."
Travelling in the U.S. is different than anywhere else, most places that have capricious security agents accept cash, in the U.S. the agents are just as unpredictable as the Ukraine or Nigeria, but offering to pay a TSA agent for a quick resolution will most certainly land you in prison. I used to travel to the U.S. a lot, my suggestion is take the feet off of the tripod, wrap the tripod in yellow tape, preferably with lettering on the tape to make it look official and declare it as a personal item, separate from the oversized and overweight carryon bag that you will insist on stuffing into the overhead compartment, like every other passenger. Or put it in a checked bag, unless you are arriving from Latin America or Asia, you can put whatever you want in your checked baggage.
American airlines are so desperate to get people to check in bags instead of overloading the overhead bins, anything that gets past the dogs is fine. Other countries, my experience is the opposite, your checked baggage will be cut open and your underwear examined for contraband, but in the U.S., if it doesn't smell like like cocaine or explosives, you have nothing to worry about. (This is checked baggage only, wearing the wrong colour of socks can get you a pat-down in the walk-through security lineup.)