I had created a post last week asking if I could carry on a Ries tripod with small spiked feet. The consensus seemed to be that it was probably a borderline thing with the TSA, and that it would be safer to just check it.
Well, I didn't. Not at first.
It turns out that the TSA has some rule about the length a point object can be, and tripod feet are longer.
It also turns out that when you are at security and they tell you something has to be checked instead of carried on, they don't just "gate check" it like oversize carry-ons. They make you go back to the ticket counter, and you have to stand in line to have your ticket modified.
Just FYI. Learning lessons the hardest, stoopidest possible way for the good of the forum...